deuterotheme

Noun

 * 1)  The second element of a name composed of two traditional name roots.
 * The Slavic given names Jaromir and Ludomir both contain the deuterotheme -mir ("peace").
 * The Old English name Beowulf comprises of the prototheme Beo- and the deuterotheme -wulf.

Usage notes
A deuterotheme is not the same as a suffix. Most deuterothemes originate in older forms of a language, and come from an independent word with its own meaning, such as from Proto-Slavic.