Where does Okra (the word) come from?
The word okra comes from West Africa, from the lands of the Igbo in today's Nigeria and the Akan in today's Ghana. The plant crossed the Atlantic with the slave trade, and its name first appeared in English in colonial Virginia in 1679.
A West African name
Okra derives from a West African language, probably Igbo, the main language of the Igbo people of southeastern Nigeria, whose word for the vegetable is ọ́kwụ̀rụ̀. Etymonline compares Akan nkruma, also meaning okra. Akan, also called Twi or Fante, is spoken over much of the southern half of Ghana. Both words point to the same stretch of West Africa, from Nigeria to Ghana, and both are close to the English word.
Across the Atlantic
Okra reached the Americas with the Atlantic slave trade and was recorded in Brazil by 1658. The English word okra first appears in 1679, in the Colony of Virginia. In North America it spread through the South: Thomas Jefferson noted that it was well established in Virginia by 1781, and by 1800 it was commonplace throughout the Southern United States. The first mention of different varieties of okra there came in 1806.
Why people think of the American South
Okra is a pillar of Southern cooking. Fried okra is a classic dish of the region, and okra can thicken its soups, so many people take the word for a homegrown Southern one. But the name, like the plant itself, came from Africa. Enslaved Africans brought the word with them, by mouth rather than in writing. Elsewhere okra picked up other names: in Brazil it is quiabo, and in some English-speaking countries it is also called lady's fingers.
Sources: en.wikipedia.org › Okra ↗ · etymonline.com ↗ · en.wikipedia.org › Igbo language ↗ · en.wikipedia.org › Akan language ↗ · bittersoutherner.com ↗