baptismal

Etymology

baptism + -al

adj

1. Of or relating to baptism.
2. Of a name, conferred at baptism.
   The neophyte was given a new name in place of the baptismal one, usually of an evil and revolting character, and this was written in blood in the Devil's book, the covers of which were bound in the skin of unbaptised infants. 1936, Rollo Ahmed, The Black Art, London: Long, page 107

noun

1. A baptismal name: a name given at baptism.
   ...Mr. Andrew Theophilus Smith, or some such unlikely pair of baptismals... 1872, Augustus De Morgan, A Budget of Paradoxes, page 120
2. A baptismal font: a large basin used for baptism.
   The baptismal is in the front of the sanctuary.