 Northkill remained the largest Amish settlement into the 1780s and then declined as families moved on to areas of better farmland, mainly to Lancaster County and Somerset County in Pennsylvania, where they formed the Lancaster Amish Settlement around 1760 and the Somerset Amish Settlement in 1772.Although it existed for only a brief period, the Northkill settlement was fundamental in establishing the Amish in North America.The Northkill settlers included the progenitors of many widespread Amish families, such as the Yoders, Burkeys, Troyers, Hostetlers, and Hershbergers.