Other than Riley, I like the names your cousin picked. I don't think twins should have matching names. It just reinforces the stereotype that twins are clones of each other. Sure, it sounds "cute," but cuteness, IMO, is not a great thing when it comes to names. Names that sound cute on little babies might get tiresome or start to seem silly when they grow up.
The catterpillar does all the work, but the butterfly gets all the publicity. -George Carlin
See my 29 adopted PP's in my profile!