I found a cluster of 3 matches managed by the same manager. Manager is not related. All are small matches.
I was able to place 2 of them into my tree easily, because their tree is nicely documented, AND Ancestry’s ThruLines helpfully showed them descended from a Maria Nilsdotter (1829-1875) in my tree. Three other people also show up in ThruLines as descended through Maria Nilsdotter. These are all 6th cousins or 6th cousins once removed, IF ThruLines is correct that they are descended from that Maria.
One of the matches — not one with the shared manager — I likely never would have been able to place in my tree otherwise. The person has no shared matches (>20cM) with me, and has only one person in his tree, himself. Fortunately, his tree is not private, even if his name is not visible to me because he’s living, so ThruLines did its work and found a connection via Maria Nilsdotter.
Except that these people are not descended from that particular Maria Nilsdotter, who never married or had children, but another, who is a generation earlier in my tree and born in a neighboring parish, whose years are also 1829-1875, but on different dates. So an error in ThruLines proved a plus, because that other Maria’s connection would have put these folks a generation too far removed for ThruLines to highlight it!
The real placement has them related to my farmor (paternal grandmother) via my 7th great grandparents Erik Andersson Levin and Elisabeth Larsdotter Brattström. This is part of what I call my Silbodal line. Yes, that couple moved to Silbodal and had their children there, though they are from other parishes. Erik is listed in a few sources as a gränsridare, or frontier rider or border rider, a customs official.
What is especially interesting, genealogically, about Erik is that his great-grandparents, Anders Andersson Bratt (1609-1677) and Ingrid Joensdotter Ekman (1620-1687), were parents of both Anna Andersdotter Bratt (1650-1727), my 9th great grandmother via my paternal grandmother, and Erik Andersson Bratt (abt 1660 – 1721), who was my 7th great grandfather via both my grandfathers! (I call their line of descent Stavnäs, for the parish they and many of their more recent ancestors came from.)
So the people in this cluster are related to three of my grandparents.
HOWEVER, it doesn’t stop there. Because the only DNA match to two of that first three that shows up in shared matches (where only people who share 20cM or more with both me and the match will show up), is someone I know has only Norwegian descent and is related to my maternal grandmother’s father’s line in Oppland, Norway.
And not only that — the third match managed by that manager seems to have Rogaland heritage, and matches only to a person who has Rogaland ancestry! That person does not match the two Swedish lines, but one of the other of that initial three is her child.
So yes, that means now at least some of the people in this cluster may be related to all four of my grandparents and all six of my six great-grandparents. (Because my grandfathers were brothers, I only have six great-grandparents.)
It seems to me I have an inordinate number (15 or more) DNA matches who are related to me in two ways, just because AFTER IMMIGRATION TO THE USA, people in two (or three) branches coincidentally found each other and married. This was of course aided by the reality that Norwegians and Swedes tended to move to similar places, at similar times, and often married each other.
So these are small matches. The one in this cluster with 2 segments shared just might have each of those from a different line of descent, and without a chromosome browser in Ancestry, and because I don’t see them in GEDmatch or other sites, I probably won’t be able to know that for sure. The others have one segment shared — but I may not be able to say with certainty which of my four lines of descent (the ones I call Oppland, Rogaland, Silbodal, and Stavnäs) they are related to.