Ebba Eriksdotter Vasa
Ebba Eriksdotter Vasa (circa 1491 – 21 November 1549) was a Swedish noblewoman.
She was the mother of Queen Margaret Leijonhufvud and the second cousin and mother-in-law of King Gustav Vasa.
Maria Thins
Maria Thins( c. 1593 – 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family.
Marian Shields Robinson
Marian Lois Robinson( née Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama.
Mairead inghean Eachainn
Mairead inghean Eachainn, also known as Mairead nic Eachainn, was a consort of Alexander Stewart, Earl of Buchan (a man also known as the "Wolf of Badenoch").
She was the daughter of a man named Eachann, and probably the mother of several children, including Alexander's like-named son, Alexander Stewart, Earl of Mar.
Alexander Stewart, Earl of Buchan
Alexander Stewart, Earl of Buchan, Alasdair Mór mac an Rígh, and called the Wolf of Badenoch (1343 – 20 June 1405), was the third surviving son of King Robert II of Scotland and youngest by his first wife, Elizabeth Mure of Rowallan.
He was the first Earl of Buchan since John Comyn, from 1382 until his death.
Alexander married the widowed Euphemia I, Countess of Ross, but they had no children.
He did have a large family by his longtime mistress, Mairead inghean Eachainn.
Alexander was Justiciar of Scotia for a time, but not an effective one.
He held large territories in the north of Scotland before eventually losing a large part of them.
Alexander is remembered for his destruction of the royal burgh of Elgin and its cathedral.
His nickname was earned due to his notorious cruelty and rapacity, but there is no proof that it was used during his lifetime.
Vera Miletić
Vera Miletić (Serbian Cyrillic: Вера Милетић; 8 March 1920 – 7 September 1944) was a Serbian student and soldier.
She was notable for being the mother of Mira Marković, posthumously making her the mother-in-law of Serbian president Slobodan Milošević.
Priscilla Pointer
Priscilla Marie Pointer( born May 18, 1924) is an American stage, film and television character actress.
She began her career in the theater, including productions on Broadway.
Later, Pointer moved to Hollywood to act in films and on television.
She is the mother of Amy Irving, therefore making her the former mother- in- law of filmmakers Steven Spielberg and Bruno Barreto and the mother- in- law of documentary filmmaker Kenneth Bowser, Jr.
Cornelia (mother of the Gracchi)
Cornelia( c. 190s – c. 115 BC) was the second daughter of Publius Cornelius Scipio Africanus, the hero of the Second Punic War, and Aemilia Paulla.
She is remembered as a prototypical example of a virtuous Roman woman.
She was the mother of the Gracchi brothers, and the mother- in- law of Scipio Aemilianus.
Baroness Gösta von dem Bussche-Haddenhausen
Baroness Gösta von dem Bussche- Haddenhausen( 26 January 1902 – 13 June 1996) was the mother of Prince Claus of the Netherlands, who was the Prince Consort of Queen Beatrix of the Netherlands, thus making her the mother- in- law of the former Dutch Queen.
She is also the paternal grandmother of King Willem- Alexander of the Netherlands, who is the current Dutch King.
Eldon Howard
Eldon Howard was a British screenwriter.
She was the mother- in- law of Edward J. Danziger and wrote a number of the screenplays for films by his company Danziger Productions.

Question: Who is Mairead Inghean Eachainn's mother-in-law?