Where does “Tadeu” come from?

Tadeu (Portuguese) comes from Latin Thaddaeus, from Ancient Greek Θαδδαῖος, from Biblical Hebrew תַדַּי.

Ancestry of “Tadeu”, step by step

Step	Language	Word	Meaning
1	Latin	Thaddaeus	—
2	Ancient Greek	Θαδδαῖος	—
3	Biblical Hebrew	תַדַּי	—

Tadeu — Etymology, Origin & Word History | Etymology Explorer