Jane Shirley was the daughter of Alexander & Elizabeth Shirley. The witness, Robert Shirley, was likely her brother known as "Roadman" Shirley. Jane (Shirley) Orr died in Scotland in 1918- does her death certificate list her mother's maiden name? James Orr also died in Scotland (1917)- does his death certificate list both parents? In both cases the informants, even if one of their many children, may not have known much about the families in Ireland since they grew up in Scotland.
James & Jane named their 4th son Hugh, presumably after James' father. The eldest three sons were Alexander (after Jane's father), Charles (not a name found in Shirley family) and John. The first daughter was Catherine (again not a Shirley name) and the second Elizabeth Jane.