It will be a cover name for some business/very rich individual. Lots of companies do it - you'd be surprised how many companies like "N415JK LLC" there are - some are more creative than others! (that's just an example - not real!).
Their registration addresses often trace back to lawyers etc that organise it for them - it not only keeps them confidential, but I suspect it could have tax benefits as well.
Many are registered in Wilmington, DE
, so I suspect it could have something to do with tax.
For instance - there are loads of aircraft registered under different company names at:
3511 Silverside Road, Suite 105 Wilmington DE