VANESSA
\v(a)-nessa, van(es)-sa\ as a girl’s name is pronounced va-NESS-ah. It is of Greek origin, and the meaning of Vanessa is “butterfly“. The name of a genus of butterflies that includes the Red Admiral and the Painted Lady. Also possibly an early-18th-century literary name of English origin created by Jonathan Swift for “Gulliver’s Travels” as a pseudonym for Esther Vanhomrigh, based on the first syllable of her surname, and possibly the Latin verb “esse”, meaning “to be”
VALLERIE
\v(a)-lle-rie\ as a girl’s name is pronounced VAL-er-ee. It is of Latin origin, and the meaning of Vallerie is “strong, healthy“.
source: http://www.thinkbabynames.com