d' 1
prep.
1. de (used in French names as an elided form of de ): Charles Louis d'Albert.
2. di (used in Italian names as an elided form of di ): Gabriele d'Annunzio.
d' 2
Pron. Spelling. contraction of do or did before you: How d'you like your eggs cooked? D'you go to the movies last night?