Thadeo

Thadeo is a masculine name with ancient roots, representing a Latin variation of the Greek name Thaddeus or Thaddaeus. The original Aramaic name 'Tadday' means 'heart' or 'courageous.' This name appears in Christian tradition as one of Jesus's apostles, also known as Jude in some accounts. The Spanish and Italian variation Thadeo adds a melodic, Mediterranean quality to the name while maintaining its historical significance. Though relatively uncommon in English-speaking countries, it enjoys more popularity in Hispanic and Latin American communities. Thadeo projects strength and character while offering the friendly nickname options of Theo or Tad. The name carries both religious significance and a timeless quality that transcends trends.

Pronounced tah-DAY-o.

As of October 2026, Thadeo ranked #4129 in US births in 2025 SSA.