Nominalized

Yoruba prefixes: Major one is A- in Akilapa, Atoyegbe, Atobatele, Ajoke, etc. A- denotes the noun phrase ‘the person’ in the expression, but it acts as a prefix because most Yoruba names are nominalized forms of clauses.

In both countries the terms were nominalized to mean "those who serve in close attendance to the nobility", the pronunciation in Japanese changing to saburai.