What is the use of the double L in Llama and double A in Aardvark? [duplicate]

Always wanted a clear explanation as to why these animals had double letters at the beginning of the spelling. What’s up with that?

Both terms are from foreign languages which used the double letters:

Llama:

wooly-haired South American ruminant, relative of the Old World camels, c. 1600, from Spanish llama (1535), from Quechua (Inca) llama.

Aardvark:

also aard-vark, South African groundhog, 1833 (in German from 1824), from Afrikaans Dutch aardvark, literally "earth-pig" (it burrows), from aard "earth."

(Etymonline)

Etymology
LLama is Peruvian in origin, transmitted via Spanish
Aardvark is a name from Afrikaans, a language derived from Dutch.
In both cases, words are allowed to start with double letters.