Mattias is a distinctive boys' name in England & Wales, ranking #1406 in 2025 with 19 recorded births. The name reached its all-time peak in 2023 with 31 births ranking #965. Since 1996, the popularity has increased by 533.3%. In 2025, approximately 1 in every 14,312 boys born was named Mattias. FALLING Recent data shows the name is currently falling.