The son, John Milne Jnr., was a civilian pilot (a former competitor in the King's Cup Race[8]) who would fly home at the weekends from the Barbour factory in Glasgow, where he worked during the week.

[9] Barbour's sister, Helen, married Thomas Andrews, architect of the Titanic.

"[10] A deeply religious man throughout his life he served on as a Member of the General Synod of the Church of Ireland.

[1] presented the East Window to Christ Church Cathedral, Lisburn, in memory of his wife and son.

[12] A prize cup at the boat club of Queen's University, Belfast is also named in his honour.