The modern Greek form of Ματθαίος is actually Mattheos, as the ancient Greek vowel combination -ai- becomes -e- in modern Greek:https://en.wikipedia.org/wiki/Greek_alphabet#Sound_values (in English)Also compare the modern Greek names Αικατερίνη (Ekaterini), Αιμίλιος (Emilios) and Καίτη (Keti) in the main database.As such, you should either remove the usage of "Greek" from this entry, or keep it and specify that Matthaios is an alternate transcription in modern Greek (just like you did with e.g. the entry for Aikaterini). [noted -ed]A known Greek bearer of this name is the former soccer player Mattheos Maroukakis (b. 1990):https://en.wikipedia.org/wiki/Mattheos_Maroukakis (in English)
https://en.wikipedia.org/wiki/Greek_alphabet#Sound_values (in English)
Also compare the modern Greek names Αικατερίνη (Ekaterini), Αιμίλιος (Emilios) and Καίτη (Keti) in the main database.
As such, you should either remove the usage of "Greek" from this entry, or keep it and specify that Matthaios is an alternate transcription in modern Greek (just like you did with e.g. the entry for Aikaterini). [noted -ed]
A known Greek bearer of this name is the former soccer player Mattheos Maroukakis (b. 1990):
https://en.wikipedia.org/wiki/Mattheos_Maroukakis (in English)