Montross

From Fettipedia

Montross was once a member of Jaster Mereel's True Mandalorians.

However, he would later betray his group to their sworn enemies, The Death Watch, leading to the death of the Mereel. Jango Fett, having taken over the place of Jaster as the groups leader would later avenge this betrayal by helping to kill Montross and the rest of the members of the Death Watch.

References

• Jango Fett: For All Seasons
• Bounty Hunter