The name that is transliterated as «Aaron» in English means «light,» «a mountain of strength,» «to be high.» (Source: Cornwall / Smith 1997 )
In Catalan Sign Language and Spanish Sign Language it is translated as «stones on chest plate» (according to Exodus 28:15-30) (Source: John Elwode in The Bible Translator 2008, p. 78ff. )
«Aaron» in Spanish Sign Language, source: Sociedad Bíblica de España
In Colombian Sign Language, Honduras Sign Language, and American Sign Language, the chest plate is outlined (in ASL it is outlined using the letter «A»):
«Aaron» in ASL (source )
For more information on translations of proper names with sign language see Sign Language Bible Translations Have Something to Say to Hearing Christians .
See also Moses, more information on Aaron , and this lectionary in The Christian Century .