The Evelina mentioned above is Alfred's sister, so if you're using her (I assume it would be as a connection to her husband via the Lloyds) you get him in the mix, too.

Also we didn't ever decide anything about the Diggorys except their mom being a former Browne, so you could make your new girl (or her husband) a Diggory cousin and be tied to Esther Browne and Clara Ross that way!

I'd be open to the Lockhart fam having cousins as well if @"Fortuna Lockhart" is into it. Lock himself is inactive atm so totally up to Hawke on that one. xD