The name shamrock is derived from Irish seamróg, which is the diminutive version of the Irish word for clover (seamair) meaning simply "little clover" or "young clover". Often when you see a picture of St. Patrick, in his hand you’ll see a Shamrock along with his shepherd’s staff. Why does he hold a shamrock? Because back in the 5th century St. Patrick used the shamrock to teach the Irish about the one true God and the blessed trinity. A fact I found interesting about the shamrock is this all clovers can be called shamrocks, but not all shamrocks are clovers. Many more plants are called shamrocks around St. Patrick’s Day than the rest of the year when they are probably called 'Oxalis' or 'clover.