Thanks for clarifying Gaile, & to others for reply.
A descendant of my 1840 emigrant ancestor's wife's sister put some of his Feeneys on Wikitree, then asked me to take over as PM of them [done], & upload the rest of my Feeneys. So I'm PM for this "orphaned" person's father, grandparents, & great grandparents. I intend to upload GEDCOM adding many children, dates & places, which will merge with some existing profiles, a few of which have incorrect info. I was going to merely merge this profile probably of my uncle. Lot in family, so it's taking me ages to put in sources for each BDM, so haven't created GEDCOM to upload yet. Obviously I'd be happy to be PM of my uncle, & give him a big family on Wikitree.
I'll start with Unresponsive PM report as suggested.