Where does “Portland” come from?

I notice the etymology chain provided has issues that prevent me from writing an accurate summary: 1. The chain shows "English land" followed by Latin terms (porta, portare), which don't connect etymologically to "land" 2. Multiple identical "Proto-Indo-European per-" entries suggest data corruption 3. The meaning is marked unknown 4. There's no clear path explaining how these elements combine to form "Portland" I cannot write a reliable one-sentence origin summary without a coherent etymological chain. Could you provide the corrected chain showing how Portland actually derives from its component parts?

Portland (English): named for the city in Maine

Definitions

  1. named for the city in Maine

Ancestry of “Portland”, step by step

Portland traces back through two separate lines of ancestry.

via English Port

StepLanguageWordMeaning
1EnglishPortUniversity of Portsmouth, used especially following post-nominal letters indicating status as a graduate
2EnglishportfolioA case for carrying papers, drawings,...
3Italianportafogliowallet, billfold; portfolio
4Italianfogliosheet
5Latinfoliuma leaf; a petal; a sheet or leaf of paper
6Proto-Italic*foljom—
7Proto-Indo-Europeanbʰolh₃yomleaf
8Proto-Indo-Europeanbʰleh₃-bloom, flower
9Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
10Proto-Indo-Europeanbʰōl-—

via English Land

StepLanguageWordMeaning
1EnglishLandThe part of Earth which is not covered by oceans or other bodies of water
2Middle EnglishlandAlternative form of lond; urine
3Old Englishhlandurine
4Proto-Germanichlandąurine
5Proto-Indo-Europeanklān-liquid, wet ground

Words derived from “Portland”

Every word from Proto-Indo-European bʰōl- →