In the Battle of Hoth, the Rebels were severely routed, suffering heavy infantry casualties as they bravely held off the Imperial assault so that the Rebel transports could escape.

Rebel Command

General Carlist Rieekan
Commander Luke Skywalker
Major Bren Derlin
Major Dervis
Trey Callum

Rebel Forces

Rogue 1 - Luke Skywalker & Dack Ralter
Rogue 2 - Zev Senesca & Kit Valent
Rogue 3 - Wedge Antilles & Wes Janson
Rogue 4 - Hobbie Klivian & Kesin Ommis
Snowspeeder - Tycho Celchu & Gunner
Snowspeeder - Tarn Mison & Gunner
Snowspeeder - Samoc Farr & Gunner
Rogue 8 - Zev Kabir & Gunner
Snowspeeder - Nala Hetsime & Gunner
Rogue 10 - Tarrin Datch & Gunner
Rogue 11 - Tenk Lenso & Gunner
Rogue 12 - Dash Rendar
Company led by Trey Callum protecting Outpost Beta
Company led by Major Derlin in the trenches
Company led by Major Dervis in the trenches
Other Rebel SpecForce soldiers
Anti-infantry turrets
Anti-vehicle turrets

(Kasan Moor did not fight at Hoth)

Rebel Casualties
Rogue 1 - Dack Ralter was killed when an AT-AT hit the speeder, and later it was downed and destroyed by Blizzard 4. Luke Skywalker escaped and then destroyed Blizzard 4.
Rogue 2 - Destroyed by an AT-AT.
Rogue 4 - Destroyed when it collided with Blizzard 1. Hobbie survived, it is unknown if Ommis did.
Snowspeeder - Downed by Blizzard 1 before it destroyed the shield generator.
Snowspeeder - Piloted by Samoc Farr, was downed but Samoc survived with burns.

It is said that only 6 Rogue Squadron pilots survived, these being...

Luke
Wedge
Janson
Hobbie
Tycho Celchu
Tarn Mison

This sort of means that Kesin Ommis did not survive, and he could have been killed when Rogue 4 collided with Blizzard 1, but it is unknown.

I don't think that Samoc Farr was a proper Rogue Squadron member, but an extra pilot, like Dash Rendar, who was rostered in at the last minute.

Echo Base and all it's defence facilities were lost, along with a good deal of troops. Nearly 100 injured troops made their way to the last transport - Bright Hope on the South Slope, and it's possible that other transports were filled like this. I will go into more detail on this in my next entry, on the evacuation of Hoth.