From Wiktionary, the free dictionary
From Arnolds (“Arnold”). First recorded in 1837.
Arnis m
- a male given name
- Klāvs Siliņš: Latviesu personvārdu vārdnīca. Riga "Zinātne" 1990, →ISBN
- [1] Population Register of Latvia: There were 4985 persons named Arnis in Latvia on May 21st 2010.