In one of Rav Emanuel Feldman’s books, he writes the following funny true story: He and his son were both Rabbis (I guess his son was the assistant Rabbi or something.) In order to differentiate between them, people would refer to one as the Father and the other as the Son.
One day someone called and he picked up the phone. “Rabbi Feldman speaking.”
“Are you the father or the son?”, asked the lady.
“Neither. I’m the holy ghost.”
As soon as he said it, he realized that it was a bad idea as she might be christian. Turns out she was, but she had a sense of humor, so it was alright.