Declan and
Elliot strike me as a great sibset, twins or not. They're both familiar to the eye and ear without being overused and they have a classic, understated beauty to them. I can picture them on little boys, teenagers, adults and elderly men alike without ever getting 'dated' vibes.
My favourites change on a daily basis, so if I had twins today they would be:
Leo Felix &
Julius Arthur
Leo Felix &
Emilia Charlotte
Emilia Charlotte &
Livia Therese
Yup, today they'd all have Latin first names.