Sum Thin Long 

A Chinese couple had a baby,had the nurse brought to them their new born baby.It was a beautiful baby with a dark complexion.Without a doubt,it was a lovely baby although dark in skin color.

"Congratulations" the nurse said to the parents 
"What would you name the baby",asked the Nurse.

"Well"replied the puzzled father,Mr.Sum .And rubbing his chin thoughtfully continued,"I think - we will call him Sum Thing Wrong".