Robbie Miller
From The Stargate Omnipedia
Son of Jeannie and Kaleb Miller in a parallel reality. Robbie and his brother Bradley were likely younger than Madison, the daughter that the couple has in our reality.
KEY EPISODE
McKay and Mrs. Miller - "Rod" McKay, a parallel version of Rodney, reveals to Jean two possible sons she may have with Kaleb: Bradley and Robbie.