This is the name of a character in the RPG Undertale. The name Asriel has several possible meanings or origins.
Asriel name is a combination of his parents' names,
Asgore and
Toriel, likely stemming from Asgore being terrible at naming things. An interesting thing to note is that this follows Anglo-Saxon naming traditions, from where the English language imported names like
Albert,
Edgar, or
Wilfred.
"Asriel" might be derived from
Azrael, the Angel of Death in Judaism and Islam.
His full name, Asriel Dreemurr, is an anagram of "Serial Murderer".
Asriel is also a name of Hebrew origin that means "Helped by god." This might be a reference to Asriel being miraculously saved and turned to a flower after dying, or helping
Frisk by breaking the barrier with his god-like powers.