Mervin was indeed the father of William Norman Lathrop. Mervin was the son of Dea. William Lathrop and Sarah Brown. Mervin was born about 1813 in Grangerville, Rush twp., Susq. Co., PA. Grangerville is now called Rush.
Mervin married Permelia Wheeler (born about 1815) in the Rush Baptist Church on October 28, 1834. The church no longer exists and the church records have never been found; however, the marriage is listed in the Montrose Newspaper records found in the Susq. Co. Historical Society.
Permelia (according to family records) was a Native American orphaned after the "Indian Wars in Susq. Co." and subsequently adopted by the Wheeler family (Joshua D. Wheeler and wife Phebe Ann) who lived next door to Deacon Wm. Lathop. I have a picture of her and indeed, she appears to be full blooded Native American.
Mervin and Permelia had 7 children (George B., Phebe Ann, Hannah, James A., Charles E., Julliet, and lastly, William Norman).
I have never found a death date or cemetery listing for Mervin, but he apparantly died before 1860 and probably in Forrest Lake Twp., Susq. Co, PA as Permelia is found in 1860 census records, but not her husband. Mervin was listed along with Permelia in the 1850 Census. Permelia was not listed in the 1870 census so I assume she passed away between 1860-1869.
Deacon William Lathrop was one of the original founders of Rush Pa and is interred in the Rush cemetery along with his wife and son who died from wounds suffered in the Civil War. The History of Susquehanna County is an easy book to find in the library and has information on him.