Larry Gonick's Cartoon History of the Universe includes the story of Yael killing Sisera. The author renders the name with the common "Y" to "J" substitution as "Jael" and, in an aside, mentions that it means "God God." I think Mr. Gonick has in mind a spelling like “יאל”. I think this is just a careless translation, but just in case:
Is there any attestation to a name like “יאל” (or some other spelling variant) with a meaning like Mr. Gonick has in mind in use in ancient Israel?