The phrase "were one the family" is often used to express a sense of kinship, closeness, and familiarity with someone. Some synonyms that can be used in place of this phrase include "part of the clan," "in the inner circle," "like a brother/sister," "treated like kin," "one of us," and "at home with the group." These phrases all convey a sense of inclusivity, warmth, and camaraderie. They're often used to describe people who have a deep connection with one another, whether they're related or not. Using these synonyms can help to add depth and nuance to your writing or speech, and can help to emphasize the strong bonds that exist between people.