Θαδδαῖος
ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
English (Strong)
of uncertain origin; Thaddæus, one of the Apostles: Thaddæus.
English (Thayer)
Θαδδαίου, ὁ (תַּדַּי, perhaps large-hearted or courageous, although it has not been shown that תַּד equivalent to the Hebrew שַׁד can mean pectus as well as mamma; (some would connect the terms by the fact that the 'child of one's heart' may be also described as a 'bosom-child'; but see B. D. under the word Smith's Bible Dictionary, Jude)), Thaddeus, a surname of the apostle Jude; he was also called Lebbaeus and was the brother of James the less: R G L Tr WH; B. D. under the word; Keil on Matthew , the passage cited; WH's Appendix, p. 11b. The latter hold the name Λεββαῖος to be due to an early attempt to bring Levi (Λευεις) the publican (Luke 5:27) within the Twelve.)