So... turns out, according to http://Ancestry.com  that Ghislaine Maxwell got married on 27 Sept, 1993.

Couldn't get hold of the records to see who to, though, so decided to search for marriages on that day, in Osceola County in Florida.
Turns out, weirdly, two Ghislaines got married that same day. And Ghislaine is a pretty uncommon name

Also thought it was odd that by Ghislaine Maxwell's name, there was no spouse listed, so I thought, OK, who's Ghislaine Clark? Turns Ghislaine Clark is actually Ghislaine Maxwell... and this is who she married

So Ghislaine Maxwell married John Robert Craigie in 1993. In 1995 (someone sent me this info), a company was set up under the name 'Ghislaine Craigie' in Georgia. Company is called Enron Inc

*Apologies previous tweet should have said EDron, not ENron

Edron Inc, according to business analytic company Dun & Bradstreet, has two employees...and generates $1.5million in sales... not bad!

Ghislaine Maxwell also registered another company to this same Georgia address in November 29, 2018. Raptor Photonics Inc is a 'Georgia Foreign Profit Corporation'

There's another business, registered under BOTH Ghislaine Craigie and John Craigie. Called Phoenix Engineering Inc. Also registered in Duluth, Georgia - in 2003.
And even more strangely.. it has email addresses for both Ghislaine and John. Shall I just...email him?!

There are four records for Ghislaine's husband John, showing he resides in Atlanta, GA; Duluth, GA; Norcross, DA; and Davenport, FL.
He appears to be 67 years old.
And Ghislaine often went by the name 'Isla Craigie'

Ghislaine's Raptor Photonics company appears to be fully operative - and specializes in surveillance, and has offices in Northern Ireland and Atlanta (with functioning phone numbers)

Alright, as someone pointed out in this thread, John Craigie appears to be deceased. Screenshot from Gwinnett Court legal notices on Sept 19 2018

Ghislaine lived with Epstein at 358 El Brillo Way in 1995, as per http://Ancestry.com  and she also had a business registered to that address...

Called 'Ghislaine Corp'. Incorporated 3 April 1995.
Agent name: Epstein
Director: Epstein
President: Epstein

Disclaimer: could be HUGE coincidence there are 2 Ghislaine Maxwells & one married, took on the surname Craigie & set up businesses in Georgia.
However I did also find a business set up under 'Ghislaine Craigie' in Duluth, Georgia called 'Britain's Finest', a British gift shop..