Óengus mac Colmáin
Óengus mac Colmáin Bec( died 621) was an Irish king.
He was the King of Uisnech in Mide from 618 to 621.
He belonged to the southern Uí Néill.
According to the genealogies, he was a son of Colmán Bec( died 587), son of Diarmait mac Cerbaill( died 565).
The later Caílle Follamain traced their descent through Óengus.
Before acquiring the rulership of Uisnech, the annals record Oengus' involvement in the feud between the rival midland dynasties of Clann Cholmáin and Síl n Áedo Sláine.
In 612 he won the Battle of Odba( near Navan, Co. Meath) in which Conall Laeg Breg mac Áedo Sláine was slain.
This battle may have been caused by Conall's claims to succeed Áed Uaridnach as high king who died in 612.
He acquired the throne of Uisnech in 618 succeeding Fergus mac Colmáin.
According to the" Annals of Ulster", Oengus was killed in 621.
According to entries in the Irish annals reporting Óengus's death in 621, which incorrectly call him a son of Colmán Már, he was" regis Nepotum Neill" or" ríg h- Úa Neill", that is king of the Uí Néill.
This appears to be synonymous with the alternative titles of High King, King of Ireland, or that King of Tara.
It is suggested that the explanation for this is that when Suibne Menn killed Máel Coba mac Áedo in 615, he supported Óengus's claims rather than taking power himself, or perhaps that Óengus was a deputy king in the south.
The king list in the" Baile Chuind", created in late 7th century during the reign of the southern Uí Néill king Fínsnechta Fledach, apparently lists an Óengus — Glorious Óengus—as king following Suibne Menn.
Another king list of Marianus Scotus includes Óengus as a high king.
His sons Máel Umai mac Óengussa and Colgu mac Óengussa were slain, as part of the southern Uí Néill feud, at the Battle of Cúil Caeláin in 635, by Diarmait mac Áedo Sláine( died 665).
His grandson, Fáelch ú mac Máele Umai was slain at the Battle of Ogamain in 662 fighting on the side of Conaing Cuirre mac Congaile of Cnogba and Blathmac mac Áedo Sláine( died 665) versus the adherents of Diarmait mac Áedo Sláine.
Bécc Bairrche mac Blathmaic
Bécc Bairrche mac Blathmaic( died 718) was king of Ulaid from 692 to 707 from the Dál Fiatach clan.
He was the son of Blathmac mac Máel Cobha( died 670), a previous king.
His byname Bairrche refers to the region of the Mourne Mountains in south County Down.
Bynames like his can refer to a region or to fosterage and there may be a connection to the Uí Bairrche of Leinster in his byname.
Faílbe Flann mac Áedo Duib
Faílbe Flann mac Áedo Duib( died 639) was a King of Munster from the Eóganacht Chaisil branch of the Eoganachta.
He succeeded Cathal mac Áedo Flaind Chathrach of the Glendamnach branch in 628.
He was the younger brother of a previous king Fíngen mac Áedo Duib( d. 618).
His sobriquet Flann meant" blood- red".
Diarmait Dian
Diarmait Dian mac Airmetaig, also Diarmait Guthbinn,( died 689) was King of Uisnech in Mide of the Clann Cholmáin.
He was the grandson of Conall Guthbinn mac Suibni( died 635), a previous king.
His father Airmetach Cáech was slain at the Battle of Mag Rath in 637.
Diarmait ruled from 653 to 689.
The feud between Clann Cholmáin and the Síl n Áedo Sláine of the early 7th century had ended in victory for the Síl n Áedo Sláine who dominated the high kingship of Ireland in the second half of the 7th century.
They began to feud among themselves, and Clann Cholmain was caught up in the feud as well.
In 662, a member of the cousin line of Clann Cholmáin Bicc, Fáelch ú mac Máele Umai was slain at the Battle of Ogamain fighting on the side of Conaing Cuirre mac Congaile of Cnogba and Blathmac mac Áedo Sláine( died 665) while fighting the adherents of Diarmait mac Áedo Sláine( died 665).
Diarmait himself was killed in 689 as part of the old feud by Áed mac Dlúthaig( died 701) of the Fir Cúl Breg sept of Síl n Áedo Sláine.
Áed's grandfather Ailill Cruitire mac Áedo Sláine was slain in battle by Diarmait's grandfather Conall Guthbinn in 634.
According to the" Book of Leinster", Conall Guthbinn was killed by the High King Fínsnechta Fledach mac Dúnchado( died 695) of Brega.
Diarmait's sons included: Diarmait's grandson Domnall Midi mac Murchado( died 763) was a high king of Ireland.
Áed Sláine
Áed mac Diarmato (died 604), called Áed Sláine (Áed of Slane), was the son of Diarmait mac Cerbaill.
Legendary stories exist of Áed's birth.
Saint Columba is said to have prophesied his death.
His descendants, the Síl nÁedo Sláine—the seed of Áed of Slane—were prominent in 7th and early 8th century Ireland.
Áed mac Dlúthaig
Áed mac Dlúthaig( died 701) was a King of Fir Cúl in Brega of the Síl n Dlúthaig sept of the Síl n Áedo Sláine of Brega.
He was the grandson of Ailill Cruitire mac Áedo Sláine( died 634), a king of Brega.
Blathmac mac Áedo Sláine
Blathmac (died 665) was a son of Áed Sláine.
According to the Irish annals, he was High King of Ireland.
Sechnassach
Sechnassach mac Blathmaic (died 671) followed his father Blathmac mac Áedo Sláine (died 665) and uncle Diarmait mac Áedo Sláine (died 665) as High King of Ireland and King of Brega.
He belonged to the Síl nÁedo Sláine kindred of the southern Uí Néill, named from his grandfather Áed Sláine (died 604).
Sechnassach's father and uncle are said to have died in a great plague—the "buide Chonaill"—which struck Ireland from 664 or 665 onwards.
While the "Baile Chuinn Cétchathaigh", compiled in the reign of Fínsnechta Fledach (died 695), does not include Sechnassach or his brother Cenn Fáelad (died 675) among its High Kings, the Chronicle of Ireland, on which other Irish annals were founded, named him as a High King on his death.
The omission of Sechnassach and his brother Cenn Fáelad from this king list may be deliberate as it was compiled in the reign of Cenn Fáelad's killer Fínsnechta Fledach.
Sechnassach's marital alliances suggest that he had close relations with the kingdom of Leinster.
His only recorded marriage was with one Findelb ingen Chellaig, who may have been a daughter of Cellach Cualann(died 715).
His daughter, Bé Fáil (died 741), was in turn married to Cellach Cualann.
Two other daughters of Sechnassach, Murgal and Mumain, are known, but no sons.
Little is recorded in the annals of Sechnassach's reign except his death.
He was killed in November 671 by Dub Dúin, king of Cenél Coirpri, a minor Uí Néill kingdom on the upper reaches of the River Boyne near Clonard.
His brother Cenn Fáelad became high king after him, probably in 672.
The "Annals of the Four Masters" record of him:Full of bridles and horsewhips, was the house in which dwelt Seachnasach,Many were the leavings of plunder in the house in which dwelt the son of Blathmac.
He has appeared in both the novels and short stories of Peter Tremayne's Sister Fidelma mysteries.
Conaing Cuirre
Conaing mac Congaile( died 662), called Conaing Cuirre, was a King of Brega from the Síl n Áedo Sláine branch of the southern Ui Neill.
He was the son of Congal mac Áedo Sláine( died 634), a previous king of Brega.
The territory of Brega that he ruled was called Cnogba( Knowth) or North Brega which he ruled from 634 to 662.
He ruled during a time when his uncles Diarmait mac Áedo Sláine( died 665) and Blathmac mac Áedo Sláine( died 665) were jointly High King of Ireland.
The annals record a battle between Blathmac and the adherents of Diarmait at the Battle of Ogomain in 662.
Conaing was slain fighting on the side of Blathmac in this civil war.
His allies, Ultán son of Ernaine, chief of Ciannachta, and Cenn Fáelad son of Gerthide, chief of Ciannachta Arda were also slain.
His descendants ruling at Cnogba were known as the Uí Chonaing.
His sons Congalach mac Conaing Cuirre( died 696) and Irgalach mac Conaing( died 702) were also kings of Brega.
Irgalach's son Cináed( died 728) was late High King of Ireland, the penultimate Uí Chonaing High King, the last being Congalach Cnogba in the 10th century.
His daughter Caintigern married Cellach Cualann( died 715), the Uí Máil king of Leinster and was mother of Saint Kentigerna.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Question: Who is Blathmac Mac Áedo Sláine's paternal grandfather?
Answer: Diarmait mac Cerbaill