Hello! I am researching the Critchlow surname. My Critchlow family originated in Pennsylvania - this is the earliest place that they have been found. The earliest ancestor is James Critchlow who died in 1762 in Chester Co., PA. He had a son named David who married Martha. Her maiden name may have been Leech. I descend from David's son William who married Mary Polly Burnsides. They resided in Westmoreland Co., PA. From there the family spread out. My branch mainly resided in Butler Co., PA. Other allied names in this family include Macurdy, McCurdy, Gilleland, etc. Please contact me if your Critchlow family has any ties to this or other Pennsylvania Critchlow families.