Reading about the "The Cholmondeley Ladies" painting, this paragraph on Wikipedia came to my attention: "The painting was in the collection of Thomas Cholmondeley, the third son of Sir Hugh Cholmondeley and his wife Lady Mary Cholmondeley (née Holford), who was an ancestor of Baron Delamere. John T. Hopkins (1991) suggests that the portrait shows two daughters of Sir Hugh and Lady Mary Cholmondeley - Lettice, first wife of Sir Richard Grosvenor, 1st Baronet (and mother of Sir Richard Grosvenor, 2nd Baronet), and Mary Calveley (died 1616), wife of George Calveley."
Checking on Geni about their family, I found this profile but there is no Thomas, Lettice or Mary as this Hugh Cholmondeley and Mary Holford's children. I wonder if is this because that information from Wikipedia is proved to be false or because no one on Geni knew about it. On the second case, I believe one of the managers of this profile should add the rest of Hugh's children.
Lettice's profile on Geni could be found here: Lettice Cholmondeley (the dates seems to match), but I couldn't find this Thomas nor Mary's.