Where does “porteyro” come from?

porteyro (Old Portuguese) comes from Late Latin portarius, from Latin porta, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “porteyro”, step by step

StepLanguageWordMeaning
1Late Latinportariusdoorkeeper”, “gatekeeper; gatekeeper; porter,...
2Latinportagate, especially of a city; entrance, passage,...
3Proto-Indo-Europeanper-before, in front; first; to go through
4Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Latin porta →