First off, I apologize for mis-writing George WHITEFIELD Allen's name.Thanks for correcting me.
Secondly, the info I have on his whereabouts after the 1850 census is: 1860, listed in Benton, Franklin Co., IL as George W. ALLEN in 7 S Range 3 E, census enumeration of 19 Jun 1860, pg 384 / 38 (Ancestry.com p38 of 249), family 262 with Hannah O. (37, OH), Mary E. (7, OH), Charles W. (5, OH), Susan L (4, OH) and George (2, OH).Clergyman United Baptist.From Vermont. (ae 42) 1870, listed in Wellington, Huntington twp., Loraine Co., OH as George ALLEN in census enumeration of 2 Aug 1870, pg 540 (Ancestry p17 of 22), family 148 with Anna (47, OH), Nettie (14, OH), Lucius (12, OH) and America (9, IL).Values: Real: $4,000; Pers: $212.From Vermont.Minister. (ae 53) 1880 George's wife listed with children and others, but without George in San Bernardino, San Bernardino CA, CA, census pg 490A: Lucius ALLENSingle22From OH FarmingFather from VT; mother from OH. Hannah O. ALLENMotherWidowedW57From OHBoardingParents from NY Nettie HARRISSisterMarried24From OHBoardingFather from VT mother from OH Nancy OWENGMotherWidowed77From NYBoarding.Parents from RI Lamar HARRISNephewSingle10MFrom CAFather from TN; mother from OH Abel R. NEVERSOtherSMaleW70MAFarmerMAMA Jennie ...LENOtherSFemaleW19OHVTOH
So, unless Hannah's mother remarried, Hanna's maiden name seems to be Owen.And, it appears George died between 1870 and 1880 censuses.
As for Pearly and Reuben, it's great that you have their marriage location.I was not aware Pearly had removed to VT before her marriage. I have been showing Pearly's parents as Chileab Smith and Nancy Marshall.I was not aware of a Mehitabel being in the family.Do you have some more information on that mother / daughter relationship?Chileab and Nancy removed to Lorain Co. before 1824, with Nancy's death occuring 5 Dec 1824 and Chileab's death occuring 28 Aug 1840.I'm thinking they travelled with Reuben, Pearly, and family.I have indication it was about 1817.Some of my information is third-party derived, so I do not have strong sources for the Pearly / Chileab and Nancy relationship.
You mention that Lydia Wkeelock was Goerge's second wife.I was not aware of George's two marriages before Hannah, and the resulting children.Thanks for that info. Do you have names and dates for them?
If I missed some of your points / questions, let me know.