now-SICK-ə, which is almost definitely incorrect, and the middle syllable makes it a guilty pleasure. I believe no-SI-kee-ə (British) or now-si-KAY-ə (American) are the correct pronunciations, and I prefer the latter.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080