It's not. Captain Goldeneagle aka Etiole Swanzen is a fictional character -a silver skinned merman - who appeared in several short stories I wrote/published in the late 1970s to mid 1980s.  I don't know why locals started calling my car The Goldeneagle or the homeless man who slept in it at night Etiole. You'll have to ask them, because they are the ones who say it, not me.