[Misterioso]

From Board of Editors list of Volume 124: Petko Peev. Ya' think?

[Verginius Rufus]

Petko Peev. I think I've heard of him. Doesn't he usually go by his nickname Pet?

Actually Petko seems to be a common Slavic name (not sure where it comes from but maybe a translation of "Quintus" since pet and variations thereof mean "5" in Slavic languages). I know a Bulgarian-American whose surname is Petkov. John Paul II beatified a Croatian nun whose surname was Petkovic.