Sir Simon de Genevill, Lord of Culmullin, m. Joan Fitz-Leon, Lady of Culmullin, and had issue daus. only, viz., Matilda m. to Baldwyn, Lord Slane; Elizabeth m. Sir William de Loundres, Baron of the Naas; and Joan, m. to John Cusack. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, England, 1883, p. 228, Genevill, Baron Genevill]
Sir Simon de Geneville or Joinville, who m. Joan, dau. and heir of Richard FitzLeon, succeeded in her right to Culmolyn. His son, Nicholas, dying v. p. without issue, his, Sir Simon's heirs, were the son of his dau. Joan, who m. John Cusack, the son of his dau. Elizabeth, who m. William de Loundres, and Simon, Lord Slane, the son of his dau., Matilda who m. Baldwin, Lord Slane. Matilda appears to have been the eldest dau., and, in her right, her son succeeded to Culmolyn, which remained in the Fleming family until the forfeiture in 1691. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, England, 1883, p. 609, Genevill, Baron Genevill]