Is there any way to search a object names based off userId? (only part of the name is the id)

I have names some objects in my game as there userId then the name of the object. I thought this would help me track but I am not sure how I would find them based off the userId. I thought it would be with string.sub or string.len but I cant find a way to get it to work.

stuff = game.Workspace:GetChildren()
--or wherever you have your objects
TableOfStuff

for _,v in ipairs(stuff) do
	if v.Name:find(tostring(PlayerUserId)) then
		table.insert(TableOfStuff, v)
	end
end)

return TableOfStuff

I am assuming that you know what the userId is