Scott Borgerson is the latest person mentioned as being her husband. (unverified)
He would be a good fit, owns a shipping container company.
https://www.dailymail.co.uk/news/article-8535837/Ghislaine-Maxwells-husband-Scott-Borgerson-boasted-dating-high-profile-woman.html
https://www.the-sun.com/news/117528/who-ghislaine-maxwell-boyfriend-scott-borgerson/