When looking for synonyms for the phrase "your own flesh and blood," there are many options that can be used to describe family members, particularly those related by blood or marriage. These synonyms include terms such as "kin," "relatives," "family members," "siblings," "parents," "offspring," "heirs," "descendants," and many others. Each of these terms can be used to describe familial relationships, from close and intimate connections, to those that are more distant or removed. Ultimately, the choice of synonym will depend on the context and the particular nuances of the relationship being described.