Out of your list here's my association.
Max
Leo
Rory - the racing car or Amy Pond from Dr Who's husband.
Brodie
Dylan
Flynn - Rider (tangled)
Arlo - the good dinosaur
Otis - Reading
Frankie - goes to Hollywood
Luca
Twin boys I know of.
Thomas and Matthew
Ollie and Fraser
Fred and George (seriously).
Famous twin boys, well. One of the pair might be famous...
Will and Rupert (Young)
Mark and Paul (Vin Diesel and twin)
Ashton and Michael (Kutcher)
Dylan and Cole (Sprouse)
Robin and Maurice (Gibb)
wiki help to continue that list.
It might be worth suggesting names to avoid as a pair too.
Michael and Jackson
Reggie and Ronnie
Personally I think Liam and Luke (as in Hemsworth non twin brothers) goes together quite well and could be called either way round. Same with Edward and Henry but it depends on how traditional a person you are and whether you would associate with Jekyll and Hyde.
Connor and Lucas/Lucas and Connor
I do feel for you. I found naming boys so much harder than our girls. Our twins are boy/girl so no help other than twin boy has Joshua and Joseph for names. They run together well, but it might be too much to name two separate boys and both could be shortened to Joe which might be a problem when they are a lot older and in separate classes and careers.