Exclude "Leviathan" or pick a different 5 letter word in Hebrew, and there is no intellectual property inflingement, it becomes legally distinct from "Old Bessie". If you plan on making it a logo.
If leviathan = לִויָתָן
הא שטן = Ha Satan
ילד עז = goat kid
מחומש = pentagram
Adding the spiral as part of the design allows use of the sabbatic goat/pentagram, especially if the spiral is part of the pentagonal structure and not noticeably in the background. There is also leeway for spoofs commercially (Like the Trump one)
The very bottom one I would say is distinct enough.
Unless they want to come after the contours bring identical. So like Vanila Ice changed Queen/David Bowie with one additional beat, add an interior line on the design of the goat/pentagram, change the eyes, or something different enough so if you ommercialize it no one has a claim of any of the above.
For a bad and rough example and because I'm bored.
Given the 30 hits of acid thing, and promoting psychedelics why not add a 3rd eye? LSD opens that right up.