Where does “American bullfrog” come from?

American bullfrog (English) comes from English bullfrog, from English Frog, from Portuguese froco, from Latin floccus, from Frankish flokko, from Proto-Germanic *flukkô, from Proto-Indo-European plewk-, from Proto-Indo-European plew- — to fly, flow, run.

American bullfrog (English): A large species of toad, Aquarana catesbeiana (syn. Rana catesbeiana or Lithobates catesbeiana), found in North America

Definitions

  1. A large species of toad, Aquarana catesbeiana (syn. Rana catesbeiana or Lithobates catesbeiana), found in North America

Ancestry of “American bullfrog”, step by step

American bullfrog traces back through two separate lines of ancestry.

via English bullfrog

StepLanguageWordMeaning
1EnglishbullfrogAny of various frogs having a croak that...
2EnglishFrogAlternative form of frog
3Portuguesefrocoflock
4Latinfloccustuft, wisp of wool
5Frankishflokkodown, wool, flock
6Proto-Germanic*flukkô
7Proto-Indo-Europeanplewk-to fly, flow, run; to splash, to flap with hands
8Proto-Indo-Europeanplew-to fly, flow, run

via English american

StepLanguageWordMeaning
1EnglishamericanA citizen or national of the United States of America
2English-nAlternative form of -en; API; Alternative form of...
3Old Norse-innUsed to create adjectives from nouns, meaning...
4Proto-Norse-īna-
5Proto-Germanic-īnaz-en
6Proto-Indo-European-iHnosCreates adjectives of materials
7Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European plew-Every word from Proto-Indo-European plewk-Every word from Proto-Germanic *flukkô