Nani. However if you are considering this as a name for a non-Hawaiian child, or yourself... keep in mind that it is considered very rude in the Hawaiian culture to take a Hawaiian name if you are not Hawaiian. Hawaiians consider names a gift and it is to be given by family members not just thought up out of the blue. If you have any respect for other cultures, don't name your children names of ethnicities you are not.
Hawaiian: Beautiful = nani African: there is no such language as "African"
The Hawaiian translation for beautiful is nani.
nani
Puanani
Pēpē u'i.
aloha nani
ho'aloha 'iki [....ee-kee]
Ka pua nani
Nani, u'i, maika'i
Aloha e ka hoa, which means "Thank you, friend" in Hawaiian.
For a general friend you would say hoaloha. For an intimate friend you would hoa pili.
It means "most beautiful"Since 'nani' means pretty/beautiful in English, & 'loa' means very, I'd say that the name Naniloa translates to very beautiful in English.