I'm Argentine with a Ukrainian last name, originally written Явтушенко. My Russian father and grandmother are deceased (and they didn't have a clue as to its meaning — they weren't Ukrainian speakers). I know that the ending -шенко is very common in Ukraine, but that, in addition to a song called "Where do you go, Явтуше?" (partially translated) is all I know.
What's the meaning of my last name, Явтушенко?