Hi,
Thanks for the quick answer. I know for a fact that they are related. Francisca Colman was born in a very small rural town in southern Uruguay, just where all the other Colmans come from. There are not many Colmans in the region, so although I have not been able to find the papers (because they were lost after the parish was restored), it is very likely that they are related one way or the other. My main interest, however, is to trace the line back to England, to know if there are any registers of Colmans emigrating to southern South America.
Thanks! :-)