The Hebrew that is transliterated as «Dan» in English is translated in Spanish Sign Language with a sign that signifies «snake,» referring to Genesis 49:17. (Source: Steve Parkhurst)
«Dan» in Spanish Sign Language, source: Sociedad Bíblica de España
For more information on translations of proper names with sign language see Sign Language Bible Translations Have Something to Say to Hearing Christians .
More information on Dan (son of Jacob) and the Tribe of Dan .