krstiti

1. to baptize; to christen
   Dete su krstili u Sabornoj crkvi. — They christened the child in the Cathedral Church.
   Ko će krstiti vašu bebu? — Who is going to baptize your baby?
2. (krstiti se) to cross oneself
   Baka se krsti svaki put kad prođe pored crkve. — Grandma crosses herself every time she passes a church.
3. (+ acc. and instr.) to name; to nickname
   Drugari su ga krstili Profa. — His mates nicknamed him Prof.
   Mačku smo krstili Maza. — We named the cat Maza.
4. colloq. (krstiti se) to be astonished; to be amazed
   Krstim se kad vidim kolike su cene. — I'm amazed when I see how high the prices are.
5. (krstiti se) to be baptized; to get baptized
   Krstio se kao odrastao čovek. — He was baptized as an adult.

In the sense 'to name', the name usually stays in the nominative or goes into the instrumental: krstili su ga Pera / Perom.