In English, a vegetarian who eats eggs and dairy products can be referred to as an ovo-lacto vegetarian. By the same token, could a person who eats honey but is otherwise vegan be meaningfully called ...
As I understand it, both the prefixes "Hept-" and "Sept-" are used to indicate seven of something. We have examples of English words that use both: e.g. Heptathalon, Heptagon, Heptane vs ...