Ambroisius as a Baby Name. Meaning and Origin of Ambroisius

What is the meaning of the name Ambroisius ?

The baby name Ambroisius is a Male name , 4 syllables long and is pronounced /æmˈbrɔɪsiəs/ (am-BROY-see-us); Latin: /amˈbroːsi.us/ (am-BROH-see-us).

Ambroisius is Greek in Origin.

Ambroisius is a learned, Latinized given name ultimately from Greek Ambrosios, “immortal, divine” (a- “not” + mbrotos “mortal”), via Latin Ambrosius; the -i- reflects medieval scribal and regional preferences in the Low Countries and German-speaking lands. It appears in ecclesiastical Latin and humanist usage.

Usage anchored by Saint Ambrose of Milan (4th c.), causing broad diffusion across Christendom; in medieval and early modern parish registers in the Netherlands, Germany, and Scandinavia, Ambroisius/Ambrosius alternated. Rare as a modern given name, it persists in clerical, monastic, and antiquarian contexts. Related forms include Ambrosius (Latin), Ambrose (English), Ambroise (French), Ambrogio (Italian), Ambrosio (Spanish/Portuguese), Ambros (German/Scandinavian), Ambroży (Polish), Ambrus (Hungarian), Ambrož/Ambróz (Czech, Slovak, Slovene), and Amvrosii/Amvrosy (East Slavic). Diminutives include Brose (English) and Broos (Dutch). Feminine counterparts: Ambrosia and Ambrosine/Ambroisine.

⚙ Ambroisius does not appear in any of the birth registries or name datasets we track. This usually means it's either extremely rare, a regional/traditional name not captured by official statistics, or a brand-new coinage. Use it knowing your child will almost certainly be the only one in the room.