G. Jetson
According to the chart "Medical Log SD 47215.7", Ensign G. Jetson was a Starfleet officer in the 24th century. They were listed with other individuals in a  medical log.

Based on the stardate, this chart was possibly made for the  seventh season episode  which began on stardate 47215.5. The chart was put up for auction in 2018.  

The chart was heavily populated with jokes, making it likely that G. Jetson was a reference to .

Unused production material