hello again john,
i was chatting to martinas cousins, and the story goes 3 jacob brothers came to this area from lullymore.
2 of them married 2 sisters by the name of cooke, the third brother left where we are not sure.
i hope this is of some help to you,
i will stay in touch and any more info i gather, i will send to you.
best wishes as always,
cyril