Question: Who is Charles Colmore Grant, 7Th Baron De Longueuil's paternal grandmother?
Sentence (from "Charles James Irwin Grant, 6th Baron de Longueuil"): Charles James Irwin Grant, only son of Charles William Grant, 5th Baron de Longueuil and Caroline Coffin, was born in Montreal on 1 April 1815.
Relevant evidence: Yes