a Wm Coulthard + alice Fargher had james 1804 and john 1807 in Santan - never found a marriage for them
There is a Santon MI In memory of Esther Coulthard, born at Ballaguaggan, January 20, 1813, died at (Formley?), Oct 22, 1861. (? is this Formby nr liverpool)

The relatively few Coulthards on Island c. 1800 seem associated with Douglas/Braddan