• William Haggart and Jessie Donald had five children:John Brown Haggart, a plumber like his father, married Violet Scott Milne in 1933. They had three children – Dora Donald Haggart (born 1934), Norma McLeod Haggart (born 1938) and Margaret Duncan Haggart (born 1943). To date no record of their marriages has been found.
• Elizabeth Ritchie Haggart. Married
• Annie Burns Haggart. No information
• Donald William Haggart, also took up his father’s trade. He married Elizabeth Jackson. and had one known child – William Donald Haggart (born 1930).
• Douglas Smith Haggart became a Veterinary Surgeon. He married Robina Shanks. They had one known child – William Douglas Haggart. William Douglas Haggart was born at Glespin Cottage, Douglas. He married Ann Groat Wilkie in 1968. To date no offspring have been found. On the marriage certificate, William Douglas Haggart’s occupation is given as ‘ Town & Country Planning Assistant’. His address was given as 81 Coalburn Road, Coalburn.