Looking for Descendants of a Thomas Macrae Born 17th Feb 1748 IN Killearnan Ross Cromarty Scotland to Parents Thomas Macrae and Janet Young Also...

Brother of Thomas is Alexander Born 1734, this family line is recorded in the MacRae Family book by Alexander MacRae.but no mention of Thomas.
Also looking for birth details of a Colin MacRae possibly born 1750 or 1770 in Keith, Banffshire,Scotland, who were his parents?