As for the trivia note, there's a pun that refers to Geiger counters, which weren't created until the 20th century, but it's not necessarily an anachronism, because I don't think anyone who calls him "Geiger the Counter" are actually making a pun, at least not intentionally. It's more of a coincidence, really (even if I intended the pun). Though I couldn't tell you if I made up the pun after making up the name, or vice versa.

D'WARD's 1890's