Nanak - What Does It Mean

Simple.  The father of my latest granddaughter sent a video for Nanna, and in my hurry to respond, I typed the word Nanak.  Son sent a photo text of granddaughter to me the next day using the word Nanak.  I think it stuck, and I like the word better than I would like to be called Nanna, or Grandma.  So Nanak it is.  Sounds like a word from Alaska, doesn't it?