Well, since the same pinyin is sometimes shared by many Chinese characters. So, I'm not sure whether I am right. But your surname Na should be 那. In China, some people have such a family name. Hantiong is your given name. I guess it can be written like this: 汉雄。So, your Chinese full name is 那汉雄。It sounds a little weird. But it's still Ok. By the way, the meaning of 汉 is Han nationality and 雄 stands for hero or brave and wise man.

Dear Mr. Na,

It is likely that your name Na Han Tiong is written 藍漢忠 in Chinese. Yours is Hokkien and should read Lán Hànzhōng in Mandarin.

Yours,
David Kwa Kian Hauw 柯建孝 (also Hokkien)
Bogor,
West Java,
Indonesia

Hi Mr Na Han Tiong,
I just search internet and find out your blog. By coincidence I bear the same name Han Tiong with the surname of Kie, Ji in mandarin. By origin I came for Bogor and now settle in the Netherlands. Are you related to Na Seng Liang, Na Seng Hok? Both gentlemen were my classmates from the primary up to the high school in Bogor.