"Haddest to oneself" is an archaic way of saying "kept to oneself" or "possessed privately." Synonyms for this phrase could include "owned exclusively," "retained for personal use," or "maintained possession of." Other similar terms might include "hoarded," "guarded," or "reserved." Depending on the context, additional options might include words like "selfish," "isolated," or "introverted." Regardless of the wording used, the underlying meaning of this phrase is clear: the object in question is something that is not shared or used by others, but kept exclusively by the owner for their own personal benefit or enjoyment.