Where does “Portloc” come from?

Portloc (Old English) comes from Old English loc, from Old English stede, from Proto-West Germanic stadi, from Proto-Germanic stadiz, from Proto-Indo-European stéh₂tis, from Proto-Indo-European *steh₂-.

Ancestry of “Portloc”, step by step

Portloc traces back through two separate lines of ancestry.

via Old English loc

Step	Language	Word	Meaning
1	Old English	loc	lock; that by which anything is closed; an...
2	Old English	stede	place
3	Proto-West Germanic	stadi	place
4	Proto-Germanic	stadiz	place, location
5	Proto-Indo-European	stéh₂tis	standing, position
6	Proto-Indo-European	*steh₂-	—

via Old English port

Step	Language	Word	Meaning
1	Old English	port	a port, a haven; a town, particularly one with...
2	Latin	porta	gate, especially of a city; entrance, passage,...
3	Proto-Indo-European	per-	before, in front; first; to go through
4	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European *steh₂- →Every word from Proto-Indo-European stéh₂tis →Every word from Proto-Germanic stadiz →