Seeking William Loomis

I'm searching for a William Loomis who lived in the state of New York and married in about 1822. He had a daughter named Mary M Loomis, however, he lost his wife. William married Elvira Van Tassel, probably in NY. William, Elvira, and Mary M Loomis went west in the 1830's with members of the Van Tassel family. I know about their lives in Hancock County, IL, however I am searching for William's ancestry and early life in New York. Elvira died in 1850 in Hancock County, IL. William married Lucinda Gearhard in IL. By the early 1850's William had purchased land in Iowa and moved west again. It appears William, Lucinda and a son of William and Elvira Loomis named William Loomis had all died by 1855 when William's surviving children, Margaret Angeline Loomis and Wilson Loomis, inherited the land in IA. Please contact me if you have any information regarding this family. I would really love to know William's background, as well as information on where he died. Thank you for any assistance you can provide.