Definitions

1. adjective

Of or relating to a tetronym, a name consisting of four elements, typically a personal name composed of the names of the person’s father and paternal grandparents.

“The historian noted the tetronymal nature of the ancient king’s full name.”

2. noun

A tetronym; a name consisting of four elements.

“The tetronymal names of the ancient tribe were a subject of interest among linguists.”