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.
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.
Margaret Mortimer, Baroness Berkeley
Margaret Mortimer, Baroness Berkeley (2 May 1304 – 5 May 1337) was the wife of Thomas de Berkeley, 3rd Baron Berkeley.
She was the eldest daughter of Roger Mortimer, 1st Earl of March, the "de facto" ruler of England from 1327 to 1330, and his wife Joan de Geneville, Baroness Geneville.
Livia Ocellina
Livia Ocellina was the second wife of Gaius Sulpicius Galba and the stepmother of the Roman Emperor Galba.
According to Suetonius she was: Galba was raised by her and took on the name Lucius Livius Ocella( rather than his birth name of Servius Sulpicius Galba) during the period prior to his assumption of the purple.
Roger Mortimer, 1st Earl of March
Roger Mortimer, 3rd Baron Mortimer, 1st Earl of March (25 April 128729 November 1330), was an English nobleman and powerful Marcher lord who gained many estates in the Welsh Marches and Ireland following his advantageous marriage to the wealthy heiress Joan de Geneville, 2nd Baroness Geneville.
In November 1316, he was appointed Lord Lieutenant of Ireland.
He was imprisoned in the Tower of London in 1322 for having led the Marcher lords in a revolt against King Edward II in what became known as the Despenser War.
He later escaped to France, where he was joined by Edward's queen consort Isabella, whom he may have taken as his mistress.
After he and Isabella led a successful invasion and rebellion, Edward was deposed; Mortimer allegedly arranged his murder at Berkeley Castle.
For three years, Mortimer was "de facto" ruler of England before being himself overthrown by Edward's eldest son, Edward III.
Accused of assuming royal power and other crimes, Mortimer was executed by hanging at Tyburn.
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".
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.
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.
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.

Question: Who is the mother of Margaret Mortimer, Baroness Berkeley?
Answer: Joan de Geneville, 2nd Baroness Geneville