It all depends where you are in the royal line of succession. Immediate children of the reigning Sultan will have titles as I have shown above. The same rule holds true for the crown prince and his children when he assumes the throne.
The Sultan's male siblings usually become wazirs and their male children still have prince title "pg muda" but their daughters are "Pg Anak". This is still true if they marry a commoner without royal heritage.
Sultan's female siblings may marry a pengiran anak or pengiran and usually their husbands become cheterias (noble ranked pg's). We have seen some pengiran's given the pengiran anak title after marriage to a princess. Their children will have the titles 'pengiran anak' regardless of gender. When a princess marries a true commoner i.e. without royal titles then their children will not have any titles.
If one is a pg anak and have a cheteria father, their children is a pg anak and their descendants thenceforth but only for a few generations (I'm not sure how many). Then the descendants after become just pengiran's (for both gender i.e. they are named Pg from birth). Then after a few generations they are reduced to awangku's and dayangku's.
But only a pengiran as a father can have children with awangku's and dayangku's regardless of his wife's heritage. When a dayangku marries a commoner then their children have no titles.
Now may I ask somebody, what if the Prince have 2 or 3 wives, the 1st wife will automatically be Pg Isteri or Pg Bini, but what about the other 2? Do they have titles too? If yes, then what title will they get? Thank You :)