I had the opposite thought about the domain name. From https://en.wikipedia.org/wiki/Signature https://en.wikipedia.org/wiki/Signature, emphasis mine: A signa

I had the opposite thought about the domain name. From https://en.wikipedia.org/wiki/Signature https://en.wikipedia.org/wiki/Signature, emphasis mine: A signature (from Latin: signare, "to sign") is a handwritten (and sometimes stylized) depiction of someone's name, nickname, or even a simple "X" that a person writes on documents as a proof of identity and intent. Not only is it short, but X has a connotation of identity.