The phrase "haddest claim" can be rephrased using different synonyms depending on the context and intended meaning. Some of the possible synonyms include "possessed a right," "had ownership," "asserted ownership," "made a demand," "laid a claim," "stated a right," "contended," or "put forward a case." These alternatives can help vary the language used in legal documents, formal letters, or academic writing. It is essential to choose the right synonym that accurately conveys the intended message and fits the tone and style of the writing. A thesaurus can be a helpful tool in finding appropriate synonyms.