Where does “Port-a-John” come from?

Port-a-John (English) comes from English john, from Middle English John, from Anglo-Norman Jehan, from Latin Iōhannēs, from Latin Iōannēs, from Ancient Greek Ἰωάννης, from Hebrew יוחנן, from Hebrew חנון.

Ancestry of “Port-a-John”, step by step

Port-a-John traces back through two separate lines of ancestry.

via English john

StepLanguageWordMeaning
1EnglishjohnA prostitute's client; A device or place to...
2Middle EnglishJohnAn appellation for a generic individual, especially of lower social standing
3Anglo-NormanJehanJohn
4LatinIōhannēs
5LatinIōannēsJohn biblical persons
6Ancient GreekἸωάννης
7HebrewיוחנןYahweh is gracious
8Hebrewחנוןgracious, merciful, compassionate; passive...
9Moroccan Arabicخنونةmucus, snot
10Arabicخُنَّة

via English portable

StepLanguageWordMeaning
1EnglishportableAble to be carried or easily moved; Able to be...
2Middle Englishportable
3Latinportabilisportable, capable of being carried
4Latin-bilis-ble
5Proto-Italic-ðlisForms adjectives from verb stems indicating capacity or worth of being acted on
6Proto-Indo-European-dʰlis
7Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...
Every word from Arabic خُنَّة
Port-a-John — Etymology, Origin & Word History | Etymology Explorer