Something I love about old English novels--referring to couples by the man's last name and the girl's first name. A few examples:

Darcy and Elizabeth

Emma and Knightley

Rochester and Jane

even Clarissa and Lovelace

While Fitzwilliam, George, Edward, and Robert are all fetching names... I like the affectionate formality of his last name. Its kind of cute.

(Cathy and Heathcliff don't count because Heathcliff only had one name =)