Unfortunately, Wikitree doesn't propagate haplogroup determinations from other companies out to the tester's relatives.
To find other testers, you could run searches on Wikitree's lists of members who tested with other companies that report Y haplogroups. Search for Elliott, variant spellings of the name, E-M35, and the former designation(s) for this haplogroup.
It would be very helpful if Wikitree would propagate haplogroups from other companies.