Cephas, original Greek: Κηφᾶς (Kēphâs), means "a rock" (Young's Literal Translation) or "a stone" (King James Version).
Keefas, alunperin kreikkaa: Κηφᾶς (Kēphâs), tarkoittaa "kalliota" (Young's Literal Translation) tai "kiveä" (King James Version).