Molly was getting quite tired of hearing the arguments over what to name the newest member of the Weasley family.

"For Merlin's sake!" she cried out, turning away from the stove and pointing her wand at Percy and the twins as they continued arguing once again in the sitting room, "just choose one!"

In the end, Arthur solved the dilemma with an old Muggle ha'penny he found in the alley behind The Leaky Cauldron: heads for "Squeakers" and tail for "Scabbers".