My husband Martin has no known Celtic blood. However, when we lived in Scotland for two years, he demonstrated a very strong Celtic connection. He loved Scottish music and dance and many other aspects of this culture. I did not understand this strong affinity.
His last name, McCrea, is an adopted name. His father Kenneth, abandoned by his birth father, loved his second step-father, an Irishman with the last name of McCrea, more than any of his other dads. He took on both the name and the heritage of his adopted dad. This cultural identity was passed on to his son, my husband.
Love is the key to this case of cultural adoption – the love between an adopted father and his adopted son, transmitted to the next generation culturally.