Seems possible as he did have 4 children in 1911 with Ellen Leonard. Although he is the head of the household in 1911 in Longford street. Is it possible he could have lived between the two. I think he was a bit older than Ellen. Apparently my Grandmother told my Mum he used to go away for weekends. Then he disappeared at Ellens funeral. My Grandmother never saw him again.
On the 1929 death record in Monaghan of the Ellen LEONARD she is described as married
This would imply her husband was known to be alive at that time
If Thomas LEONARD was from the border region and died in the North of Ireland after 1929 his death record would be with GRONI
Click here for LINKThere is also a Prison record for Thomas LEONARD
Oct 13 1923 in Mountjoy Dublin
Age 52; Height 5' 11"; Hair Bro/Grey; Eyes Grey; Complexion Fresh
Born Strabane; Address Arva, Co. Cavan; Next of Kin Ellen LEONARD, wife; Occupation Pedlar