I learned from the 1850 census that my great-grandmother Lavinia Strohl is the daughter of Nicholas D. Strohl of Lower Towanensing Township, Carbon County, PA. I don't know how to go backward from Nicholas D. when there are so many Strohls (Stroals) named Nicholas. Can anyone help me with who Nicholas D.'s father is, and grandfather . . .?? I've been wondering if the D stands for Daniel, but there are multiple Daniels