Complex sentence: Because "Katahdin" means "Greatest Mountain", "Mount Katahdin" means "Mount Greatest Mountain", which local people maintain is incorrect, however the official name is Mount Katahdin as decided by the US Board on Geographic Names in 1893.
Split into simpler sentences: Because "Katahdin" means "Greatest Mountain", "Mount Katahdin" means "Mount Greatest Mountain", which local people maintain is incorrect. However, the official name is Mount Katahdin as decided by the US Board on Geographic Names in 1893.