Isaac was born at Tawa Flats. His father, Friend, features in an earlier profile.
Isaac married Sarah Stratton (born at Lower Hutt in 1876) at Wellington in 1896.
They had five sons, at least two of who died in infancy.
Isaac started working life as a labourer at Makino, then Blackridge. From at least 1905 he was a carter in Levin living in Kent St. By 1922 he was a gardener for the Borough, living in Cambridge St. His widow stayed in the house which later became No 171.