One source states that Sarah Dunn born about 1790 was also a daughter of Thomas Joseph Dunn and Margaret Peggy Beeler. This source does not list Catherine and Mary Dunn as children.
_UID0FFB65E8E0FBB44EAD33B1A0CD3B89463C52 One source states that Thomas Joseph Dunn and Margaret Peggy Beeler were married in Bristol, Sullivan County, North Carolina.