Their eldest daughter Marie married Ralph Weir, and another daughter Janet married James Cleilland of Cleilland.
A younger son, William Somerville, married Margaret Hamilton of Preston and founded the Somerville of Plane family near Stirling.
William's older son and heir, John Somerville, 3rd Lord Somerville, married Helen Hepburn, daughter of Sir Adam Hepburn by Janet Borthwick, then secondly married Mariotta Baille.
[2] In March 1478 his widow Janet, Lady Craigmillar sued John, Lord Somerville, for goods and silverware which belonged to her by right of terce.
[3] This biography of a Lord of Parliament in the Peerage of Scotland is a stub.