If you will go to Family Treemaker site, I believe there is a site for the Ewens. I haven't researched it yet, but if you type in Julius Ewen, there is a listing for Timothy being the son of Julius Ewen and Sarah Middleton. As for Timothy being the immigrant ancestor, I don't know. It has Julius marrying 13 Nov. 1752 in Haddonfield, Camden Co. N.J.