The proposed relationship of George William Arnold as the father of George William Arnold and Leonard Arnold is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 1st cousin, twice removed relationship between JA (a descendant of the Leonard Arnold ancestral line) and LW (a descendant of the George William Arnold ancestral line) with a shared segment of 253.18 cM across 11 HIR segments.

This match is consistent with their placement within these shared ancestral branches.