Nicknames for Mattias
3 nicknames, sorted by where they actually get used.
Office-safe
Tias
formal
Matt
formal
Playground-friendly
Matti
casual
Mattias carries 3 documented short forms — Matti, Tias, and Matt — drawn from its German-origin roots. The list splits into 2 office-safe picks and 1 playground-friendly option so you can match the moment.