Ours began many years ago.
my daughter, then aged 4 or 5 would watch and read the "old bear" series.
for anyone who doesnt know it, its a group of toy animals who come to life..one of them being a duck.
now this guy cant do anything without a bloody good moan and groan, just like young Sophies grandad.
the name stuck with him, and is even known at work as "duck".
when we started goecaching, i knew he would take the p*ss bigtime, as he does, but to have the last laugh i thought we could use his nickname somehow, and as we are of younger generation, we couldnt be ducks...so we are the ducklings.