Netherlandish

Etymology
From.

Proper noun

 * 1)  The Dutch language.
 * 2) * 1897, Chamber's encyclopœdia:
 * It has been said that Old English is Dutch, and to no other nation is the study of the Netherlandish more interesting than to the English.

Adjective

 * 1)  Of or pertaining to the Netherlands.

Usage notes
Almost exclusively used today in reference to early Netherlandish painting.