Brooch or Broach ?

So how do we spell the pretty clips we attach to our clothes. Is it Brooch or Broach? Why are their two different spellings? As I see both variations used I decided to do a little research.

Goggle offers us far more choice of sites and searches using the term "Brooch". Wiki gives Brooch its own entry but not so for Broach which simply seems to be an alternate spelling.

So my choice is made - for this Blog they will be Brooches ( or pins, or clips)

The pretty at the top of this post is a hand painted Victorian brooch made of porcelain and decorated with flowers.