If you are asking how to spell it in Arabic, then Robert is روبرت Kathy is كاثي Twins are توأمان Otherwise, Kathy and Robert are pronounced the same, and twins is pronounced TAWA'AM.
it depends in which kind of Arabic you want it... standard Arabic: "kayfa 7alok" for a male / and "kayfa 7aloki" for a female and both are spelled the same way كيف حالك Egyptian slang:...