My father was Greek and I have two first cousins in Athens. I do not speak Greek, but they help with translations. My father wrote a little history of his family before he passed, so I know all of his grandparents. Beyond that, the evidence is spotty. His family was from the Ionian Island of Kefalonia.
I also have a number of 3rd cousins or so on Ancestry and GEDmatch, but unfortunately we cannot place how we are connected.