Where does “Poroszenko” come from?

Poroszenko (Polish) comes from Ukrainian Пороше́нко, from Ukrainian -е́нко, from Ukrainian Тара́с, from Ancient Greek Ταράσιος, from Ancient Greek ταράσσω, from Proto-Indo-European dʰreh₂gʰ- — to irritate; rough.

Ancestry of “Poroszenko”, step by step

Step	Language	Word	Meaning
1	Ukrainian	Пороше́нко	Poroshenko
2	Ukrainian	-е́нко	Added to a stem to form a patronymic or matronymic surname
3	Ukrainian	Тара́с	—
4	Ancient Greek	Ταράσιος	—
5	Ancient Greek	ταράσσω	I disturb; I agitate
6	Proto-Indo-European	dʰreh₂gʰ-	to irritate; rough

Every word from Proto-Indo-European dʰreh₂gʰ- →Every word from Ukrainian -е́нко →Every word from Ukrainian Пороше́нко →