John was born about 1847, the son of unknown parents. The place is not known.
His wife was Mary Yeats, who he married on 28 NOV 1871 in Cumbernauld. They had no known children.
!Source: http://www.jaap.fsnet.co.uk/Webnew/Jaapwebnew.html The Jaap family tree. Entries: 2488, Updated: Sun Feb 29 09:17:00 2004, Contact: John Jaap