I am also researching the Surrena families.I have done extensive research on all the families descending from Philip and have never been able to find the son who moved to Iowa.The spelling of the name in Westmoreland County was Serena.After he arrived in Venango County, it somehow changed to Surrena.The Venango County 1850 Census just says that Philip was born in Pennsylvania.I always believed his parents to be Joseph and Anna Sinderene/Serena from information I found in Westmoreland County several years ago when I was still "green" at genealogy and didn't know who or what I was actually looking at.The 1850 Census lists his age as 71 which would make a birth year of 1779; however, his grave is marked "Died Dec. 29, 1869 Aged 94 Y" which would make a birth year of 1775.That happens.The records don't always match. Others in the household in the 1850 Census were wife Elizabeth age 63,son Philip age 24, and son John age 16. I know that Philip of Iowa (to distinguish between Philip of Venango Co. and Philip of Butler Co.,) married in Pennsylvania someone named Nancy. The Clintonville Cemetery has 2 graves that are marked "Children of Philip and Nancy Surrena" that I believe are children of Philip of Iowa. The children died in 1856 and 1859. He was also in the Civil War (Pennsylvania)so am assuming he lived here many years and probably had other children before moving to Iowa.The interesting thing about the Surrena spelling is that it has enabled me to trace all Surrenas back to Philip of Venango Co. no matter where they lived except now I found a Wyoming branch and an Iowa branch that I can't connect, but may be my "missing links".I would be interested in learning more about these families.