Astromeh, an astromech droid of the R-series, was in service to the Galactic Republic during the Clone Wars. He was assigned to colonel Meebur Gascon and became a member of D-Squad.
Jamie Cosley wrote about Astromeh in a non-canonical part of Launchpad in Star Wars Insider 206.
- " Launchpad " — Star Wars Insider 206 (The first time he was mentioned)