Dear god, I hope Laurence won't get shortened to Larry - unless he steps into a time machine that takes him back to 1950s America!
I would imagine Laurence would be Laurie if it hadn't to be shortened when he was older, Alexander - I'd be happy with whatever shortening, ditto Robert, Guy - nice and impossible to shorten. Can't bear how overused Charlie is but may have to concede that's what it would get shortened to (unless we go with Chaz. Unlikely).
Jemima - hate Jem, so probably something to consider. Quite surprised at the polarised opinions on Jemima, I hadn't thought it could be considered a horrid name, but I suppose names have that effect.
Not keen on Rosalie or any other Ros-variation. Maybe Rosalind and Madeleine do sound a little too similar, but it doesn't overly bother me as they'll grow up as individuals as well as sisters.
I do like Alexandra (it's one of my names) but really dislike all shortened female versions.
I know only one Penelope locally, but concerned a few celebrities have named their daughters Penelope recently (z list, but still) so going to track it in the ONS list this year to see where it is nationally.
Love Elizabeth, but the only abreviartion I like is Lizzie.
Argh! Found this easier the first time round!