Parents of Mary Young Baird B PA D IA 1866

Mary Young b. 1827 in Pennsylvania married Robert Campbell Baird in Madison, Iowa in 1855. I believe she may be the daughter of Elizabeth McGoun and William Young of PA who moved to Iowa in early 1850s. Elizabeth McGoun is one of the daughters of Robert McGoun and Margaret Kiddoo. Does anyone have any have any information that could confirm my hunch. Thank you.