Zac and Andie
Here is a picture from my son, Zac's birthday dinner last week of him and his girlfriend, AndiE, not his sister, my daughter, Andi.
Things are looking like they will be getting married, so I will have a son and son-in-law named Jacob and a daughter and daughter-in-law named Andie.
If this trend continues and all of my children marry people with their siblings names there are going to be several Andis and Carlys since the boys outnumber the girls 2 to 1.
We were able to solve the 2 Jacob problem by calling one Big Guy. Had we known that the scrawny 15 year old boy Andi brought home was going to be her husband someday we might have chosen his nickname with a little more thought. But what's done is done, however, after several discussions we just can't get her to go for Big Gal.