Robert Crichton
Robert was born about 1452.  He died before February 1492.

 Marion Stewart
Marion was born after 1455 in Lennox Hills, Dunbarton, Scotland.

 Marion Crichton
Marion was born about 1470 in Sanquhar, Dunfrieshire, Scotland.

 Margaret Crichton
Margaret was born about 1476 in Sabquhar, Dumfrieshire, Scotland.