Generally, pax are bombarded with PA's (mostly generated by "commercial management types" who want to minimise QF's exposure to litigation). Consequently, I try to keep my PA's to the shortest possible but still get the important information to the pax, and thus I don't mention the other crew members names except when another crew member is flying the sector, then I introduce him/her. Most pax just want to get on with the movie or reading etc.