Where does “Jacko” come from?

Jacko derives from English Jack, which comes from English John, tracing back through Old French Johan and Latin Johanna to Proto-Indo-European roots.

Jacko (English): A nickname for a person whose name is Jack, whose surname is Jackson, or similar

Definitions

  1. A nickname for a person whose name is Jack, whose surname is Jackson, or similar

Ancestry of “Jacko”, step by step

Jacko traces back through two separate lines of ancestry.

via English Jack

StepLanguageWordMeaning
1EnglishJackA placeholder or conventional name for any man,...
2Middle EnglishjakkeA padded coat, especially as light armour
3Anglo-Normanjacke
4Middle Frenchjaque
5Middle Frenchjacques
6Frenchjacquesplural of jacque; a stupid person; a jemmy or...
7LatinIacobusJacob; James; Saint James
8Ancient GreekἸάκωβος
9Ancient GreekἸακώβJacob
10HebrewיַעֲקֹבJacob
11Hebrewעָקֵבheel of the foot; heel

via English laughing jackass

StepLanguageWordMeaning
1Englishlaughing jackassThe laughing kookaburra, Dacelo novaeguineae
Every word from Hebrew עָקֵב