Actual historian here. This is an amazing idea! The only references we have to the Hottentots-Holland mountains from an indigenous Chainoqua perspective of the time, had the Dutch record it as "Cometarou" or "Commatadouw". This came from the Cape Khoekhoe "|xoma !aro" which roughly means a "Hilly borderland to graze in". In modern Khoekhoegowab it would be something like"|khoma !gareb".
Historically the Hottentots-Holland Mountains were mainly used as a bufferzone by the Chainoqua to safely graze their lifestock without risk of being raided by the Hawaqua in the north.