This guy is called a Ceylonese, simply because his forefathers came from Ceylon now known as Sri Lanka
a minority Tamil whreas the majority are Sinhalese in Sri Lanka
these ceylonese were brought to oversee the majority Tamil speaking coolies ...simply because both spoke Tamil ,and such Ceylonese were called the writers which is the modern version of clerks
so , there was a deep divide within our local Tamils , these Ceylonese who favoured the British over the rest of the mass Tamils
but like our Baba the Peranakan these Ceylonese had access to English education , hence overlording the rest of the Indians here
LKY followed suit in his selection, which is actually a divide and rule thingy
therefore , this so called Indian Jayakumar , was never an Indian to begin with
but the PAP is happy with the status quo