Jenkins was born in Newbridge, Caerphilly in 1880.
Jenkins married Helena Leigh Roose (birth registered during July→September 1879 in Wrexham district[REF] - death registered during October→December 1967 (aged 88) in Bournemouth district[REF]), sister of Wales association football international Leigh Richmond Roose, during July→September 1903 in St George Hanover Square district [REF].