I'm not
Dutch but from what I can gather, it does look like it's a variant of
Lotte (and/or a diminutive of
Charlotte). I've used this website (
http://www.meertens.knaw.nl/nvb/) and typed in '
Lot' to find out if it's another diminutive of
Charlotte.
When I've clicked on 'verklaring,' it comes up as "Zie
Charlotte" (see
Charlotte) and nothing else (it comes up most of the time whenever I type in a diminutive of a name), so yes, it is another diminutive of
Charlotte and most likely a variant or a shorter form of
Lotte.
~I luv
London Tipton 'cause she's an idiot like moi~
My pinool:
http://www.behindthename.com/pnl/149249