Mere curiosity, only to me, the logo of the Leibniz Assocation https://www.leibniz-gemeinschaft.de found on the home page of Leibniz Open Science https://www.leibniz-openscience.de/ found in https://social.coop/@eloquence/111606255712722192 looks more similar to my signature (last name part) as of perhaps 2000 (it's scrawled a lot more, not natural to use a pen anymore) than anything I've seen.