Hi saw this and thought u might be the link...my gallagher /gallaher...came from via allegheny county,pa. possible hooked up with future husband who came thru from Erie-New York-Canada.... that Davidson side is very well documented....Elizabeth Gallagher hooked up with an Alexander lewis Davidson whose father Jerimiah Davidson had first ferry boats connecting Washington/Fayette/Greene..Ten mile Creek Families..which on the Monongahela River near early settlement called Brownsville PA...which could of been part of allegheny county area before it was Fayette ..she was born in 1797..thats all we know....trying ..trying here..thanks for any info....Char