I discovered this website (http://surnames.behindthename.com/top/lists/united-states/1990) and found some really weird double-barreled surname combinations. Try it yourself and share them here.
You can use the numbers before the names if you like, so they're easier for others to find. I'll give you a few examples.
688 House - 689 Sellers
690 Herring - 113 Fisher
102 Ford - 205 Carr
I've also found these (http://names.mongabay.com/male_names.htm) websites (http://names.mongabay.com/female_names.htm) for first names.
When using a first-last name combination, use the rank of the first name. A few examples.
168 Leo - 126 Lyons
255 Max - 314 Powers
614 Paige - 44 Turner
I knew a James J. James if that counts. The J initial stood for Jim
Also, the classic - Ben Dover.
My first last name combo is so incredibly common I went to University with another girl who had the same last first combo.
On the other hand my mum's double barreled surname combined with her first name means she's the only person named that in the whole country. the only reason i didn't get her surname was bc she thought it'd be too difficult for a 5 year old to spell.
also my local MP is called David Davis so 10/10 his parents.
Gary and Phil Neville's (ex footballers) dad is called Neville Neville.