Sobhuza I
Sobhuza I (also known as Ngwane IV, Somhlolo) (ca. 1780–1836) was king of Swaziland, from 1815 to 1836.
Born around 1780, his father was Ndvungunye (also known as "Zikodze"), and his mother was Somnjalose Simelane.
He was called Somhlolo, "the Wonder," upon his birth because his father Ndvungunye died as a result of being struck by lightning.
When Sobhuza was king, Lojiba Simelane instead of his mother Somnjalose was Queen Mother because Somnjalose was an "inhlanti" or support bride to Lojiba.
Somhlolo is a greatly revered king of Swaziland.
He had his first royal capital or kraal at Zombodze in the Shiselweni region, but moved it north to new Zombodze in central Swaziland.
Swazis celebrate Somhlolo Day every September 6 as their Independence Day and the national stadium is named Somhlolo stadium.
Sobhuza was succeeded by his son Mswati II and his wife Tsandzile Ndwandwe as Queen Mother after a short regency by Queen Lojiba Simelane.
Sobhuza by the time of his death a conquered a country claimed to be reaching modern day Barberton in the north, Carolina in the west, Pongola River in the south and Lubombo Mountains in the east.
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.
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.
Lomvula Mndzebele
Lomvula Mndzebele was the Queen Regent of Swaziland briefly in 1815 after the death of Ndvungunye until Sobhuza I became the king of Swaziland.
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.
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.
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.
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.
LaYaka Ndwandwe
LaYaka Ndwandwe was the Queen Regent of Swaziland briefly in 1780 after the death of Ngwane III until Ndvungunye became the king of Swaziland.
Tsandzile Ndwandwe
Tsandzile Ndwandwe, also known as LaZidze (daughter of Zidze), was an "Ndlovukati" or senior queen of Swaziland from July 1868 until June 1875.
She was the daughter of Zwide kaLanga, the senior wife of Sobhuza I of Swaziland, and the mother of Mswati II of Swaziland.

Question: Who is the mother-in-law of Tsandzile Ndwandwe?
Answer: Somnjalose Simelane