Have found a death certificate for Dora Rennie in 1960 :
Dora RENNIE ( married to Helen RYAN ) died 25 July 1960 at 41 Church Street , Dundee
Father : Agostino RENNIE farmer ( deceased )
Mother : Maria RENNIE ( formerly BIANCHI ) deceased
Edit - forgot to include age at death - he was 72.
Would you mind reporting it to Scotlandspeople as mis-indexed, thanks. I saw that death, but it is indexed as F for Female. It was kind of you to chance using your credits on it for EdithKennedy21, and good that it was indeed the male Dora. No wonder he was still appearing in some records after 1918. Perhaps whatever "sickness" caused his discharge, meant that before she emigrated, his wife took on running the household, given she was named on the Valuation Rolls as Tennant/Occupier rather than him.
RENNIE
DORA
72
F1960
301 / 25
Liff, Benvie and Invergowrie
Sad, though, that for whatever reason, family members/friends were, it would seem, led to believe he had died in WW1. At 1927, the children were old enough to know their father had not been killed in WW1, but perhaps went along with this 'story' once in Canada.