From the mid-nineteenth century until his death, the younger Khouw and his brothers, Luitenant Khouw Tjeng Kee and Luitenant Khouw Tjeng Po, were widely acknowledged as the wealthiest Chinese in their native hometown of Batavia (now Jakarta, capital of Indonesia).
Dari pertengahan abad kesembilan belas sampai kematiannya, Khouw dan adik laki-lakinya, Luitenant Khouw Tjeng Kee dan Luitenant Khouw Tjeng Po, dikenal luas sebagai orang Cina terkaya di kampung halaman asli mereka di Batavia (sekarang Jakarta, ibu kota Indonesia).