I actually made him Nancy's brother (by creating Chester and Queenie Landgraab), and used him as the reason for the Nancy's branch of the Landgraabs being matrilineal, as since Johnny was Chester's only son, he feared the name would die out, essentially forcing Geoffrey to take Nancy's name. I have also given them another daughter, be she married a Worthington (whose sister in turn will become a Crumplebottom, linking all the old money families together).
I'll likely end up doing something similar to the Caliente's, by having Katrina use that name as the one she adopted for her ill fated music career Hispanic persona, shunning her actual Arabic heritage (when she was known as Nighat), hence her marriage to Flamenco (which her shallowness caused their divorce), plus it is implied in both games she is not a natural redhead, and instilled her values in her daughters (Dina using men to get what she wants, while Nina feels she doesn't have to work for what she wants).