The Ẽfini name and logo originated in several limited-edition RX-7s from the late 1980s. As a brand, it encompassed most, if not all dealers formerly under Mazda's "Auto" dealer chain.
The Ẽfini marque was a sport-oriented brand, as opposed to the more comfortable, luxury-oriented Eunos. Today, Mazda continues to use the Ẽfini name as one of the company's dealership chains, along with Autozam, but the vehicles sold no longer use it. This included the following vehicles:
The name is written with a tilde over the E, which can be assumed to be a nasal vowel written in the International Phonetic Alphabet, the pronunciation symbols universally taught in Japan, and used quite often in product naming. The accompanying katakana (アンフィニ anfini) shows the intended pronunciation in Japanese. A Google search for combinations of 'Mazda' with various spellings shows the following list, in descending order of popularity:
Mazda spells the name "Anfini" in official corporate publications, but other official sites use "Enfini" and "Efini", see for example Enfini-Aomori