Hi,
I found that William McKinlay Edmond was born 30th Dec 1917 at 60 Campie Road Musselburgh to parents William Allan Edmond (Coalminer) and Eliza Jane Anderson, on his birth certificate, mothers first name looks like "Joanna" but could be wrong. His mother and father married in 1911 according to Scotlands People website, but father William Edmond gave 30th Aug 1912 on son's BC.
EDMOND, WILLIAM Tenant at 60 CAMPIE ROAD, Musselburgh 1915 Valuation Records - VR006000023
In 1930, I find his father at 19 Millhill, Musselburgh, proprietor at Machinery Tenants Improvements.
By 1940, 19 Millhill is now a factory owned by him, and he is in a wooden house at 39 Eskside South, Musselburgh.
I think he may have had 5 siblings, all born at Inveresk, unable to prove, as some are less than 100 years.
Mary White Anderson Edmond born 1912,
Jane Edmond 1922,
Magdalene Edmond 1925
Thomas William Edmond 1927
Adam Edmond 1929
I have found Obituary notice in Scotsman of 13th July 1943,
" Edmond - At Western General Hospital, on 12th July 1943, William Allan Edmond, woodturner and sawmill, 19 Millhill, Musselburgh. Funerfal to Inverses Churchyard, on Wednesday 14th July. Friends desiring to attend meet cortege at cemetery gates at 2.15pm.gates."
Hope this helps to start a trail to find out more.
Tom.