My Little Weapon

Just over two years ago when we picked out the name Macy and I looked at a couple websites for the meaning, they either didn't have one because Macy was a derivative from another name, or it said 'Place of Maccius', 'Matthew's estate', or even 'sea of bitterness.' However, when flipping through a baby naming book today, I found the name to mean 'wielder of weapon.' Just now I've found more websites with Macy meaning 'weapon'. This girl is pretty feisty. I wonder what this weapon of mine has in store for me?!