I too have a Langton from Ireland.David Daniel Langton my g grandfather. I do not know when he came over here but guess about 1845 to 1850. I found a marriage for a David Daniel and Mary Ann Heney(Haney) in St. Louis, MO in 1850 but unable to prove that he is my kin. There is also a John Langton in St. Louis,d. 1904, that I believe to be David Daniel's younger brother. David Daniel also lived in Quincy, Adams Co. IL and Dallas, Dallas Co. TX. He died in Texas in 1895. If you have any knowledge of this family or find anything in your search I would greatly appreciate knowing about it. I'm up to a brick wall at present. Thank you.