Lady Blanche was sister to Daisy, Countess of Warwick. Her article from thepeerage.com with citation of child follows, "F, #7703, b. 14 February 1864, d. 17 August 1945
Blanche Maynard was born on 14 February 1864. She married Colonel Lord Algernon Charles Gordon-Lennox, son of Charles Henry Gordon-Lennox, 6th Duke of Richnond and Frances Harriett Greville, on 31 August 1886. She died on 17 August 1945 at age 81.
She was the daughter of Colonel Hon. Charles Henry Maynard and Blanche Adeliza Fitzroy. Her married name became Gordon-Lennox. She was invested as a Dame Commander, Order of the British Empire (D.B.E.) in 1919. She was invested as a Dame of Grace, Order of St. John of Jerusalem (D.G.St.J.).
Child of Blanche Maynard and Colonel Lord Algernon Charles Gordon-Lennox: 1. Hon. Ivy Gordon-Lennox+1 b. 16 Jun 1887, d. 3 Mar 1982."
From theesotericcuriosa.blogspot of 18 July 2011.