The phrase "haddest reference to" can have several synonyms that convey similar meanings. Some of the synonyms for this phrase include "referred to," "alluded to," "mentioned," "cited," or "made reference to." Each synonym represents a different way of describing the act of referring to something, whether it be a person, place, or thing. The use of synonyms in writing and communication can help to add variety and clarity to a text, making it easier to understand and follow. Choosing the right synonym can also help to convey a more specific meaning or tone, depending on the context.