Actually, I think you have gone wrong somewhere - David Urquhart and Elizabeth Monro are not Daniel Urquhart's parents.
Daniel Urquhart bp 25 Feb 1805 at Knockbain (he was baptised with the Gaelic name of Donald, which translates as Daniel). His parents were Donald(Daniel) Urquhart b 1771 and Grace (Grizel) Morison, born 1771).
Daniel 1805 married Helen Brooks, as you know. I have Daniel's death cert (1867), husband of Helen Brooks, which names his parents as Daniel Urquhart and Grizel Morison.