I don't find the 1900 census for this family. I found the 1900 for Ursula and John and the child John William isn't on it. I don't see anything about this family in Ohio. I think any connection to Ohio is a coincidental name. Is there proof that George Underwood is a child of this family? Where was he for the 1910 census? He should have been with the family at 16? About the mother, I don't see any proof of her LNAB other than the marriage record of a son that is likely not her son. She is always Jessie on the censuses not Jennie, not once. I posted on the bottom of her profile what I think is her birth record. This matches her parents being born in New York and Pennsylvania just like on the census records.
It's possible that George is a son of John William but not of Jessie. This would explain why he isn't on the 1910 census, he could be living with the first wife. A marriage record of John William Underwood and the 1900 census would answer most questions.
My opinion would be that George Underwood is not of this family and this Jennie Hughes is incorrect as well. Ursula, Wilma, and Wilda being on the censuses are proof that it is the correct family but ....
I would say they moved to California where Jessie died in 1925. John William died there in 1946, the California death record has his parent's LNABs on it. They had a son Kenneth that married in California as well as further proof.