I once wanted a name with an archaeological theme (my old job) that sounded like a formidable old academic lady (I'm not - I'm young and only slightly formidable). A fibula is a type of brooch (like a safety pin) and also the name of a bone in the leg. A mattock is like a pickaxe but with a wide, blunt end on one side. It's my favourite digging tool. I thought that together they sounded like a proper name. Sort of. In real life I'm known as Kate.