He is probably Willam Henry Hambly, son of Benjamin & Peace (Sherman) Hambly (our ancestors). This family group is in the 1850 & 1860 censuses at Tiverton. I am making the assumption that these are the correct parents for these children, and that there is not another couple with the same names in the same time period.
However, there is a marriage record for William H. Hambly & Mary M. Thurston for 26 November 1850 at the Amicable Congregational Church. So, there must be two individuals of the same name born around the same time; which one is the son of Benjamin & Peace? The 1860 Federal Census at Fall River shows William H. Hambly & his wife Mary M., both age 31, and two children, Sarah & Julia. If the ages are correct, they would have been born around 1829, in which case this William is an individual born later than the son of Benjamin & Peace.