During its early years, residents feuded with neighboring squatters on Clara's Hill, founded by immigrants who had lived in the same region in Mountmillick, Ireland.
Famous families who left during this time, or earlier, during the late 17th century, include the Newlins (who went to Chester County, Pennsylvania), Pims, Bewleys, and Dennys.
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James Jeffrey Roche – 19th century Irish-American poet and diplomat, born in Mountmellick.
Nicholas Newlin, a member of the Religious Society of Friends, an Englishman who lived in the Quaker town of Mountmellick, then in Queens County, Ireland, emigrated to Pennsylvania with his family because of religious persecution.