Nominal affix for a collective entity; a number of items of the same kind.
A place or entity with a collection/number of the same kind of items stated is marked by ka- -an. Exceptions are the words for coconut grove lahingan and banana grove uyatan which occur also with -an only. The -an seems to focus on the piece of land planted with trees while the word with ka- -an focuses on the collection of trees on the piece of land.
That place is the place of our ancestors.
Those people are our relatives.
Dem kabatuhan pangahinanganne luma'in.
He is building the house in a stony place.
Their place is in the mountains.
Pagtana'annen dem kalahingan.
He made his rice field in the coconut grove.
His house is in a banana plantation.
His coconut grove is extensive.
Whose banana plantation is that?