The proposed relationship of Brigham Murdoch as the father of
Laura Jean Murdoch and
James Howard Murdoch is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 1st cousin, once removed relationship between RB (a descendant of the Laura Jean Murdoch ancestral line) and RM (a descendant of the James Howard Murdoch ancestral line) with 704.65 cM of shared DNA across 22 HIR segments.
This match is consistent with their placement within these shared ancestral branches.