[HPforGrownups] Cousins by marriage ?

[M]

No: HPFGUIDX 106427

> delwynmarch <delwynmarch at yahoo.com> wrote: Sirius says he and Molly
> are cousins by marriage. What does that mean? To me, that would mean
> that one of the two married the other's cousin. But that's obviously
 > impossible. So what does it mean ?

Eris:

I was under the impression that the Weasleys and the Blacks were related 
and that Molly, once she married into the Weasleys, became a cousin-in-law.


 From OotP, Chapter 6, "The Most Noble And Ancient House Of Black":

"'Molly and I are cousins by marriage and Arthur's something like my 
second cousin once removed. But there's no point looking for them on 
here - if ever a family was a bunch of blood traitors it's the Weasleys.'"


So Molly was the one who married into the Weasleys, obviously, since 
she's a Prewett.  And Arthur was the blood relative (although I'm not 
too clear on how this 'once removed' business works).  Second cousins 
are basically the children of your parents' cousins - for example, if 
Sirius were to have a child, that child would be Tonks' second cousin 
since Tonks is the child of Andromeda, who is Sirius' cousin.

Please note that the Weasley line has been blasted from the tapestry, 
and we know that the tapestry carries the Black family tree, so it's 
fair to assume that the Weasleys and Blacks (and incidentally, the 
Malfoys) are all related.

Eris