All four!
WAKU - IMO 9548031 - Cayman - ON 741370 - c/s ZCYD5 - MMSI 319002600 - 399gt - (was EPBC Holdings) now FRS
Affair Ltd

WAKU - IMO 9695262 - Cayman - ON 747107 - c/s ZGGF4 - MMSI 319108400 - 1081gt - (was Nautical Corp) now ??, renamed MOCA

WAKU - no IMO - Cayman - ON 743546 - c/s ZGBN3 - no MSSI - 81gt (77ft) - Waku Yachts LLC, Delaware

TT WAKU [tender?] - no IMO - USA - ON ?? - no c/s - MMSI 338183205 - grt?? (10m) - owner ?? [left Ft Lauderdale 12/2019, but in now in Puerto Rico]

Thanks for that David. The Benetti WAKU was also sold last year and is now named MOCA. I'd never seen the "small" boat so I will take a look at that one now.

There's a lot of legal "stuff" still going on around this yacht, particularly the current owners, FRS Affair Ltd, bought her at a US Marshall's sale last September - and were promptly presented with a $1mn bill for storage and security by a marina owner, relating to the couple of years that this yacht and the larger one (IMO 9695262 - now reported renamed MOCA) were being seized through court processes as assets connected with major drug traffickers and the Colombian terrorists FARC:
https://www.superyachtfan.com/yacht-waku.html

Then there's the smaller one - see http://www.shipspotting.com/gallery/photo.php?lid=2898493 - anyone know about this one?

All three WAKUs are on the Cayman Is register and hang around Fort Lauderdale

Indeed, she may still be in refit in Ft Lauderdale

Thank you for the information rd77, at the moment there is no record of the name change.

She was sold at auction in September 2019. I think she may have been renamed since then as well.