It was renamed from Occidental because some weird group (communist I think) calling themselves something similar and that was being associating with the languag

It was renamed from Occidental because some weird group (communist I think) calling themselves something similar and that was being associating with the language Occidentalists. As for the name change, I think it has a very general meaning, like amongst-language with the e ending being typical for Occidental nouns and the a ending for Interlingua nouns (maybe). Weirdly enough, the name push was by a guy called Ric Berger who was a Occidentalist who moved to Interlingua and probably played a part in naming both languages. BTW, both languages are very similar in vocabulary roots with Interlingua drawing inspiration from Occidental during its development (if I understood correctly).