From 2 deeds in Lawrence Co, OH, it appears that James is definitely the son of Henry & Lucy. Lawrence CO Recorders Office, Deed Record, v 7, p433: Henry & Lucy sold 120 acres in Twp 2, Range 16, Sect 14 to James for $1000 on 27 MArch 1837. On the same day, also for $1000, James sold the same land back to Henry with the stipulation that Henry & Lucy could continue to live with James and recieve all necessary food & care. If James defaults, Henry & Lucy can sell the land to raise money for their support. ANy money remaining at their deaths goes to James.
Boaz Mannon also had a son James, who moved with Boaz' widow Judah and other children to Champaign Co, OH c 1829.