Where does “Marko” come from?

I need to work through this chain carefully, but I notice there are significant issues with the data provided: 1. The chain appears corrupted or incomplete (it lists "Proto-Indo-European -kos" twice, includes fragments like "Latin o" without context, and the progression doesn't form a coherent etymological path) 2. The headword is "Marko" but the chain starts with "English Mark" 3. The known meaning is listed as unknown, making it impossible to explain sense development 4. The chain elements don't connect logically to derive "Marko" Without a coherent, complete etymological chain, I cannot write an accurate one-sentence summary that follows your rules about naming every language in order and weaving in the oldest meaning. Could you provide a corrected chain? A proper etymology for "Marko" (likely a name from Slavic languages, related to "Mark") would need a

Marko (English): Nickname for Mark

Definitions

  1. Nickname for Mark

Ancestry of “Marko”, step by step

StepLanguageWordMeaning
1English-oA colloquializing suffix; A type of person; Can...
2EnglishOA blood type that lacks A or B antigens and may...
3Middle EnglishO—
4Old Englishoever, always
5LatinoThe name of the letter "O"; o!; oh!
6Etruscan𐌏—
7Ancient GreekοLower-case omicron (ὂ μικρόν), the 15th letter of the ancient Greek alphabet. It represented the close-mid back rounded vowel. It is preceded by ξ and followed by π
8Phoenician𐤏ayin; ʿayin
9Egyptian𓁹—

Words derived from “Marko”

Every word from Egyptian 𓁹 →Every word from Phoenician 𐤏 →Every word from Ancient Greek ο →