I don't think it will be possible to determine exactly where the Flewellin family came from as I don't believe there are any written records that can provide this information. The Wandesforde family brought a number of English Protestant families to their estate after 1650. In the book "Fassadinin" by William Nolan (I believe it's his Ph.D paper), he stated that about 1/4 of the land in Gorteen in 1812 was occupied by English families including Fluellin, Reynard, Bradley, Booth, Wilson and Stone. The general belief is these families were originally from the area of the Wandesforde estate in Kirklington, Yorkshire and possibly some families with mining experience came from the Richmond area. At that time, travel to Ireland from England would be considered much the same as travel from one state to another in the U.S.A.. I have never seen any records of this travel, but if they exist, they might be with the Wandesforde family papers collection in the Irish Archives. To offer another possiblity, Tom Lyng, in his book "Castlecomer Connections" writes the following, "..the name Fluellin (Llwyllen) is Walsh (sic) and not Yorkshire". I don't know if I buy that... but there it is. Hope this is some help.