I'll judge the first 12-15. Have fun!
DH: fn is a surname, mn is classic but not a filler
DW: fn is long and feminine, mn is a filler
DS: fn means "son", mn is from nature
DS: fn means "strong", mn is a word
DD/DD: fn means "light", mn is classic but underused / fn means "dark", mn is classic but overused these days
DD: fn is an uncommon flower, mn is a city
DS: fn is between 1-20 most popular names in 1900:
www.behindthename.com/top/lists/100us1900s.php mn comes from Astronomy
DD: fn is a city, mn is a gemstone