Knowing Christ: A Question for Praying People

I have a question for people who would consider themselves practicing Christians. It really doesn't matter which denomination (I don't think). Let's say you have, as part of your regular prayer list, a section for People Who Don't Know Christ. What does this mean, exactly?

I ask because it appears that Hubby and I have landed on this section of someone's prayer list, and we're not sure why. We go to church, we actively look for opportunities to be involved in church and the community, we teach our children about God and prayer, and we genuinely believe in Christ and do our best to live according to basic Christian principles: love people, love God. The person who put us on their list is a relative of mine and knows these things about us, so we're both a bit confused and slightly hurt that this person is under the impression that we don't know Christ. I'm sure the intentions were completely good and that it can't hurt to have someone praying on your behalf.....but what does it mean?