Brothers of Chaugnar Faugn

The Brothers of Chaugnar Faugn—both lesser and greater—are simply smaller versions of him.

In the RPG...

The Lesser Brothers have roughly human-ranged stats, averaging only 16 hit-points, whereas the Greater Brothers are much larger, averaging 45. Previously, the Greater Brothers could only be harmed by magic, but this trait has since been removed in the 7e Malleus Monstrorum, replaced by a simple 3 points of armour.
    The Brothers can both attack in similar manners. They have the standard ability to fight, but can also crush their target in a bear-hug, or drain their blood using their specialized trunks. None are overly powerful, with their standard attacks averaging 6 and 9 damage respectively, their bear-hug both averaging 2 damage per round, and the blood drain causing 1 damage per round for the Lesser, and 16 CON per round for the Greater. The crush and blood drain require opposed STR rolls to break free of, so obviously the Greater Brother would be more dangerous in that regard. Considering its 165 STR, an average Investigator would only have a 10% chance of breaking free, compared to 24% against a Lesser Brother.
    Like Chaugnar Faugn, the Greater Brother also has psychic powers (though dimished), so can cause their victims to have nightmares, as well as compel people to come to them, the latter of which has an average chance of 80% success. Also, if Chaugnar Faugn is harmed, his Brothers are also affected, to a lesser degree, due to a psychic connection to their master.

In a video game...

Because the Greater Brothers are not wildly different from Chaugnar Faugn, I'd probably only include the Lesser Brothers in a video game. With their human-ranged stats, they are actually fightable. Perhaps they would serve as part of a boss fight against Chaugnar Faugn itself.

In a film...

The whole Chaugnar Faugn family would likely make good movie monsters.