"I don't believe I know your daddy." is a cunning Southern insult.
It means you aren't from around here and so they don't care what you think about anything. You haven't proven yourself through lineage nor family values. You have no shared history and you are not known.
Owe! So much for hospitality. I guess Southern hospitality is more of a "Be seen and not heard" concept.
Up North, I was raised with, "A man is known by the company he keeps." This is more individualized. It offers the implication that you are self made. You determine your destiny. You can even reinvent yourself if you want. You are the "master of your own destiny." It gives you freedom from your past.
As Orthodox Christians, we really are living in a sub-culture where it is important to know who your daddy is. But in our case it's our bishop. What we believe, how we worship and what we practice is all authenticated through our bishop. He is the core of "being in communion." This is how we know we are still connected to the original Christian church.
Did you know the Greek Orthodox Church in America is connected to the authentic Christian church through His All Holiness Patriarch Bartholomew. Patriarch Bartholomew is the 270th Archbishop of the 2000-year-old Church founded by St. Andrew, serving as Archbishop of Constantinople-New Rome and Ecumenical Patriarch.
Consider this scenario, if you wanted to start an Orthodox Church near you, you would need the blessing of a canonical bishop. You can't just go out in the middle Tennessee, build a church, hire any priest and call yourself an Orthodox Church. "Who's you daddy?" What is your lineage? What does your faith teach? Who are you accountable to? Who is going to give you credentials?
You can't be Orthodox just because you agree with the teachings of the Orthodox Faith... and you can't be Orthodox without a canonical bishop.
So I suppose "I don't believe I know your daddy." is an Orthodox saying as well.