Question: Bryan is a masculine given name, it is a variant spelling of Brian, and  is a variant spelling of which masculine given name of Irish and Breton origin, as well as a surname of which origin?

Context articles: Bryan (given name)
Albin (given name)
Roger
Brendan (given name)
Brian
Zeb (name)
Graham (given name)
Don (given name)
Angus (given name)
Blair

Bryan is a masculine given name.
 It is a variant spelling of the masculine given name Brian.
Albin ("EL-bin") is a masculine Polish, Scandinavian, and Slovenian given name, from the Roman cognate "Albinus", derived from the Latin "albus", meaning "white" or "bright".
 This name may also be a last name.
 In Estonia, France, Hungary, Poland, Slovakia, and Sweden March 1 is Albin's Name day.
 There are variant spellings, including "Albinas", a male given name in Lithuania; "Aubin", a French masculine given name; and "Albina", an Ancient Roman, Czech, Galician, Italian, Polish, Slovak, and Slovenian feminine given name.
 Albin is uncommon as a surname.
 People with the given name Albin include:
Roger ( , ) is a masculine given name and a surname.
 The given name is derived from the Old French personal names "Roger " and "Rogier ".
 These names are of Germanic origin, derived from the elements "hrōd " ("fame", "renown") and "gār ", "gēr " ("spear", "lance").
 The name was introduced into England by the Normans.
 In Normandy, the Frankish name had been reinforced by the Old Norse cognate "Hróðgeirr ".
 The name introduced into England replaced the Old English cognate "Hroðgar ".
 "Roger" became a very common given name during the Middle Ages.
 A variant form of the given name "Roger" is "Rodger".
 The surname "Roger" is sometimes an Anglicised form of the Gaelic surname "Mac Ruaidhrí ".
Brendan is an Irish masculine given name in the English language.
 It is derived from the Gaelic name Breandán, which is in turn derived from the earlier Old Irish Brénainn.
 The Old Welsh "breenhin" is the root of the name, meaning Prince or King.
 The mediaeval Latin form of the name, Brendanus, has also influenced the modern English and Irish forms.
 Variant spellings of "Brendan" are Brendon and Brenden.
 In some cases it is possible that the given name "Brandon" is also a variant of "Brendan".
 A variant spelling of the Irish "Breandán" is Breanndán.
Brian (sometimes spelled Bryan) is a male given name of Irish and Breton origin, as well as a surname of Occitan origin.
 It is common in the English-speaking world.
 It is possible that the name is derived from an Old Celtic word meaning "high" or "noble".
 For example, the element "bre" means "hill"; which could be transferred to mean "eminence" or "exalted one".
 The name is quite popular in Ireland, on account of Brian Boru, a 10th-century king of Ireland.
 The name was also quite popular in East Anglia during the Middle Ages.
 This is because the name was introduced to England by Bretons following the Norman Conquest.
 Bretons also settled in Ireland along with the Normans in the 12th century, and 'their' name was mingled with the 'Irish' version.
 Also, in the north-west of England, the 'Irish' name was introduced by Scandinavian settlers from Ireland.
 Within the Gaelic speaking areas of Scotland, the name was at first only used by professional families of Irish origin.
 It was the fourth most popular male name in England and Wales in 1934, but a sharp decline followed over the remainder of the 20th century and by 1994 it had fallen out of the top 100.
 It retained its popularity in the United States for longer; its most popular period there was from 1968–1979 when it consistently ranked between eighth and tenth.
 The name has become increasingly popular in South America - particularly Argentina and Uruguay since the early 1990s.
Zeb (variant spelling: "Zebb") is both a masculine given name and a surname.
 As a given name, it may be a short form of Zebulon, Zebadiah or Zebedee, but is now more common as a given name in its own right.
 In fact, it can also be an alternate spelling of the Hebrew word "ze'ev" (זְאֵב), meaning "wolf".
 Notable people with the name include:
Graham ( ) is a masculine given name in the English language.
 According to some sources, it comes from an Old English word meaning "grey home".
 According to other sources, it comes from the surname "Graham", which in turn is an Anglo-French form of the name of the town of Grantham, in Lincolnshire, England.
 The settlement is recorded in the 11th century "Domesday Book" variously as "Grantham", "Grandham", "Granham" and "Graham".
 This place name is thought to be derived from the Old English elements "grand", possibly meaning "gravel", and "ham", meaning "hamlet" the English word given to small settlements of smaller size than villages.
 In the 12th century the surname was taken from England to Scotland by Sir William de Graham, who founded Clan Graham.
 Variant spellings of the forename are "Grahame" and "Graeme".
 The forename "Graham" is considered to be an English and Scottish given name.
 Its origin as a surname has led to its occasional use as a female given name, as for example in the case of Graham Cockburn, a daughter of Henry Cockburn, Lord Cockburn.
Don is a masculine given name in the Irish language and a short form of another masculine given name in the English language.
 The Irish name is derived from the Irish "donn"; the name can either mean "brown", or "chief", "noble".
 The Irish name is a variant spelling of "Donn".
 The English name is unrelated to the Irish name; this name is a short form of the given name "Donald".
 Pet forms of this English name include: "Donnie" and "Donny".
 It can also be a surname, also derived from "brown".
 It is a common name in the English language.
Angus is a masculine given name in English.
 It is an Anglicised form of the Irish and Scottish Gaelic "Aonghas", which is composed of Celtic elements meaning "one", and "choice".
 A variant spelling of the Scottish Gaelic name is "Aonghus".
 The Irish form of the Scottish Gaelic name is "Aengus".
 A pet form of the given name "Angus" is "Angie", pronounced ""an-ghee"", which represents the Scottish Gaelic "Angaidh".
 A short form of the given name "Angus" is "Gus", which may be lengthened to "Gussie".
 The feminine form of "Angus" is "Angusina".
Blair is an English-language name of Scottish Gaelic origin.
 The surname is derived from any of the numerous places in Scotland named "Blair".
 These place names are derived from the Scottish Gaelic "blàr", meaning "plain" and "field".
 The given name "Blair" is derived from the surname.
 Blair is generally a masculine name in Scotland, although it is more popular in North America, where it is also a feminine name.
 A variant spelling of the given name is "Blaire".