Hi Pam,
It is possible that they are distantly related. Unfortunately the Lloyds seem absolutely impenetrable, but logically they must have come from a few small inter-related branches originally.
Interesting that your Evan Lloyd was a timber merchant - it seems there was a lot of deforestation of the area at that date. For an interesting article have a look at
http://www.heneb.co.uk/ffestiniogcharacter/ffeshisteng.html.
Kind regards,
Helen