From Gineipaedia, the Legend of Galactic Heroes wiki
The following is a list of unnamed Spartanians.
Two Spartanians at Rantemario
Two Spartanians — one with white livery and one with pink — waited behind debris and ambushed an approaching Imperial cruiser during the Battle of Rantemario in 799 UC (1 NIC / 490 IC / 3599 CE). The cruiser was destroyed. (LOGH: 'The Two-Headed Snake: The Battle of Rantemario')
Spartanian at the Black Hole
Spartanian at the Corridor
Katerose von Kreutzer accidentally locked on to (but did not fire upon) a friendly Spartanian during the Battle of the Corridor in 800 UC (2 NIC / 491 IC / 3600 CE). (LOGH: 'The Battle of the Corridor: The Invincible and the Undefeated')