LN: an occupation last name
DH: FN was in the top ten names of 1970-1979, MN has four letters
DW: FN comes from a name in a song, MN is the first name of an actress
DS/DS: FN has the same meaning of twins, but in another language, MN starts with H/ FN has the same meaning of twins, but in another language, MN has two syllables
DD: FN is related to the stars, planets, sun or moon, MN is a Roman name
DD: FN is an author's first name, MN is a Biblical name
DD: FN is a place name, MN is a color name
DS: FN has three or more syllables, MN is in the top hundred name of 2000
DD: FN is the name of a drug, MN ends in "a"
DS: FN is a nature name, MN is a unisex name
DS/DD: FN starts with the same letter as twin's FN, MN is Welsh / FN is a virtue name, MN is a flower name
Also, to help, Allegra, Aviva and Lyrica are all drugs.