Portuguese forms such as cajú carried the name from Tupi toward English.
Portuguese acajú is an alternative form in the source, not an additional consecutive card.
Sources
- Merriam-Webster: cashew
The entry supplies the Tupi ancestor and alternative Portuguese forms.
- Merriam-Webster: Tupi
The entry locates the Tupi language family in South America.
- Michaelis Dicionário · caju
Meanings of the older forms on the word path.
- Online Etymology Dictionary · cashew
Meanings of the older forms on the word path.