 For instance, Hugo Chakrabongse is a descendant of Prince Chakrabongse Bhuvanath.Some (far removed) descendants of royalty add the preposition and nobility particle "na" (ณ) to geographical names to create surnames, in the same way that members of German noble families use "von".Thus Mongkol Na Songkhla, a minister in the Surayud government, has a name indicating that he is a distant descendant of royalty or nobility in that geographical region (for instance, the surname "Na Chiangmai", belonging to descendants of the rulers of Chiang Mai, which was a vassal state of Siam).