I lost my two older sisters, one before I was born and one 20yrs ago when I was 15. DD's first name is a combination of their first names. She has my first sister middle name too as our surname meant using my second sisters middle name didn't work. I didn't ask my parents but knew they would be thrilled and they were. I didn't want to use their full names as it was to much of a reminder but found a happy medium.