Hi all,
I use FTM, and I too have two chaps who were brothers and whose wives were sisters. When I entered their details on FTM I had no problems entering the data. But it does get a tad interesting when printing off a tree chart! And I have figured out a hardcopy solution after seeking and receiving some really good RChat help.
Lets say John and Joe SMITH were brothers. And Mary and Jane BROWN were sisters. John married Mary and Joe married Jane. (I have changed the real names to protect the privacy of the living)
The two couples children have just four grandparents instead of the more usual eight. Those children are "double" first cousins. (Within my own family this has sometimes been called "full blood half brothers and sisters", but that's another story).
On an A3 sheet of paper (2 A4's joined together works for me), put all four grand-parents details down. Then in the usual spots below them, and taking into consideration the date for the two relevant marriages, put these four childrens' details down under their parents. Then you can put the details of the children of each of those two marriages in their usual position. And THEN you can add the remaining siblings for John and Joe SMITH and for Mary and Jane BROWN on the (yes, out of chronological order) "other side" of each of those marriages.
In my case, this meant listing those four children slightly out of chronological order by births, as the younger ones married first. But I ended up with a document that makes sense to the living descendants... They can clearly see the two couples (Mr &Mrs John and Mary SMITH and Mr & Mrs Joe and Jane SMITH) and the couples parents - that is the living descendants can see their own grandparents and their own parents and all their own siblings as well as their "double" first cousins.
It is perhaps easier to draw than to write it out in sentence form. I do hope I have explained it sufficiently. I got good help from RChatters when I first tried to print out the FTM computer generated trees and was disappointed with FTM's attempts.
Cheers,
JM