New Colleague - LIM KOK WING???

We have a new colleague today..When Mary came by my desk and introduce this new IT colleague..i was no idea what is his name..so ..i stop Mary and asked with an embarrassed tone.."may i know what is his name again?" then Elaine who is beside me said.."LIM KOK WING" I actually heard LIM KOK WING when he spoke to Elaine early and i heard that Elaine said "same college bla bla...with her wisppered tone. It is unclear for me to listen the full conversation anyway.. So Mary again tell me he name "LIM KOK WING" and preferable to call him Kok Wing..haha..