I don't hve much on the Lason family. Nancy Anne Lason married John Rowley in Duanesburg, Schenectady Co, NY about 1824. Her father was Joseph Lason. There was a Joseph much earlier who was on a list of possible emigrants to America from Northern Ireland. This list was persons promising to make to crossing and was dated 1718 (without chasing up the list).These folks were promising to come to New Hampshire. Another person on the list is John Campbell who may have been an ancestor of my John Campbell who was born 1798 in Otsego county and by 1800 was also in Duanesburg. John Campbell married John Rowleys daughter Ruth Rosa Rowley and her father John Rowley was married to Nancy Anne Lason.