The Latin lacus, "reservoir, lake" is the origin, in the primitive vocabulary heritage, of the Portuguese, Spanish, and Italian lago,[REF] French lac,[REF] one of its derivatives, the Latin lacuna, "pitfall, hole", "lack, want, neglect", explains the Spanish and Italian laguna [REF].
The suffix -ano is characteristic of Brazil (paraibano), pernambucano, alagoano, sergipano, baiano, goiano, and later acriano [REF].