Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Bertha of Rheinfelden
Bertha of Rheinfelden( also Bertha of Bregenz)( b.c. 1065; d. after 1128), countess of Kellmünz, was the daughter of Rudolf of Rheinfelden and wife of Ulrich X of Bregenz.
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.
Bertha of Hereford
Bertha of Hereford, also known as Bertha de Pitres (born c. 1130), was the daughter of Miles de Gloucester, 1st Earl of Hereford, and a wealthy heiress, Sibyl de Neufmarché.
She was the wife of William de Braose, 3rd Lord of Bramber to whom she brought many castles and Lordships, such as Brecknock (including Hay Castle), and Abergavenny.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Bertha of Milan
Bertha of Milan or Bertha of Luni( c. 997- c. 1040), was a duchess of Turin by marriage to Ulric Manfred II of Turin, and regent for her daughter Adelaide of Susa in 1033.
She is sometimes identified with the Bertha who was married to Arduin of Ivrea.
Bertha of Artois
Saint Bertha of Artois or Saint Bertha of Blangy( mid 7th century- July 4, 725) was a Frankish and Anglo- Saxon Abbess of noble blood.
Sibyl de Neufmarché
Sibyl de Neufmarché, Countess of Hereford, "suo jure" Lady of Brecknock (c. 1100 – after 1143), was a Cambro-Norman noblewoman, heiress to one of the most substantial fiefs in the Welsh Marches.
The great-granddaughter of Gruffydd ap Llywelyn, king of Wales, Sibyl was also connected to the nobility of England and Normandy.
Sibyl inherited the titles and lands of her father, Bernard de Neufmarché, Lord of Brecon, after her mother, Nest ferch Osbern,
had declared her brother Mahel to have been illegitimate.
Most of these estates passed to Sibyl's husband, Miles de Gloucester, 1st Earl of Hereford, as her dowry.
Their marriage had been arranged personally by King Henry I of England in the spring of 1121.
Sibyl, with her extensive lands, was central to the King's plans of consolidating Anglo-Norman power in south-east Wales by the merging of her estates with those of Miles, his loyal subject on whom he relied to implement Crown policy.
As an adult, Sibyl lived through King Stephen's turbulent reign, known to history as the Anarchy, in which her husband played a pivotal role.
Following Miles' accidental death in 1143, Sibyl entered a religious life at Llanthony Secunda Priory, Gloucestershire, England, which she had endowed up to six years previously.
Sibyl is buried at the priory, founded by Miles in 1136.
Bertha, Duchess of Lorraine
Bertha of Lorraine( or Bertha of Swabia)( b.c. 1123/30 – d. 1194/ 5) was a member of the Hohenstaufen dynasty.
She was the daughter of Frederick II, Duke of Swabia and, through marriage to Matthias I duke of Lorraine, she was duchess of Lorraine( c.1138-1176).

Question: Who is Bertha Of Hereford's maternal grandfather?
Answer: Bernard de Neufmarché