Irene Baker
Edith Irene Bailey Baker( November 17, 1901 – April 2, 1994) was an American politician and a United States Representative from Tennessee.
She was the widow of Howard Baker Sr. and the stepmother of Howard Baker Jr.
May Green Hinckley
May Green Hinckley( May 1, 1881 – May 2, 1943) was the third general president of the Primary of The Church of Jesus Christ of Latter- day Saints( LDS Church) from 1940 until her death.
She was the stepmother of Gordon B. Hinckley, fifteenth president of the LDS Church.
Dorothy Granger
Dorothy Karolyn Granger( November 21, 1911 – January 4, 1995) was an American actress best known for her roles in short subject comedies in Hollywood.
She was also the stepmother of film maker and former record producer Anthony J. Hilder.
Verona Barnes
Verona Barnes( born December 29, 1946) is an American actress who appeared in multiple New York City theater plays.
She is the stepmother of actress Rachel True.
Her roles include Mrs. Harris and the Street Person in" All God's Chillun Got Wings," as well as Jack's friend in" The Great White Hope".
Isabel of Beaumont
Isabel de Beaumont, Duchess of Lancaster, of the House of Brienne (– 1361) was an English noblewoman, being the youngest daughter and child of Henry de Beaumont, Earl of Buchan and Alice Comyn.
Henriette Feuerbach
Henriette Feuerbach( 13 August 1812 – 5 August 1892) was a German author and arts patron.
She was the wife of Joseph Anselm Feuerbach and the stepmother of painter Anselm Feuerbach, whom she supported in his art.
Susan Moody
Susan Moody( born 1940 in Oxford) is the principal" nom de plume" of Susan Elizabeth Horwood, an English novelist best known for her suspense novels.
After marrying Professor John Dalgleish Donaldson in 2001, she became the stepmother of his four children, including Crown Princess Mary of Denmark.
Henry de Beaumont
Henry de Beaumont, "jure uxoris" 4th Earl of Buchan and "suo jure"
1st
Baron Beaumont (bef. 1280 - 10 March 1340) was a key figure in the Anglo-Scots wars of the thirteenth and fourteenth centuries, known as the Wars of Scottish Independence.
Henry de Beaumont was a veteran campaigner who participated in every major engagement, from the Battle of Falkirk in 1298 to the Battle of Halidon Hill in 1333.
Although not now a widely known figure, he was, nevertheless, of considerable military and political importance.
His long experience of the Scottish wars led him to develop a battle technique later used to great effect at Crécy and Agincourt.
As one of a group of Anglo-Scots nobles known as the 'disinherited' — those who had fought against King Robert Bruce — he was to do much to overturn the peace between England and Scotland established by the Treaty of Northampton and bring about a Second War of Scottish Independence.
By his marriage shortly before 14 July 1310 to Alice Comyn, Countess of Buchan (died 3 July 1349), the niece and heir of John Comyn, Earl of Buchan, he was recognised as Earl in right of his wife.
Jane Wigham
Jane Wigham( née Smeal; 1801–1888) was a leading Scottish abolitionist.
She was the stepmother of Eliza Wigham and the second wife of John Wigham.
Maruchi Fresno
Maruchi Fresno( February 14, 1916 – July 19, 2003) was a Spanish film actress.
Fresno appeared in around sixty films and television series during her long career.
In 1947 she played the role of Isabel of Aragon in the historical film" The Holy Queen".

Question: Who is Isabel Of Beaumont's mother?
Answer: Alice Comyn, Countess of Buchan