Making them an archer replacement would make way more sense than being a villager replacement. You wouldn’t have to worry about balancing it in age 1, and it could be a relatively slow base rate like Klamath Riflemen (20% of a normal villager) so it isn’t OP. To prevent sniping out herds on the enemy side of the map, they could be limited to only hunting within the vicinity of a Tipi. They’d only need to fill the light infantry role until getting a rifle unit in age 3 so they could also be made fairly weak with high multipliers so that they fill the role but are very vulnerable to anything they don’t counter. Making them cost entirely food like Aenna would also make sense.
As for the name, something more generic like “Plains Hunter” could let them be available to other potential civs like Comanche or Cree. Since they’d be kinda stealing the cheap archer that costs purely food role from Aennas, the Hauds could also get a new archer replacement such as an Aquientor Archer.