jij.

From Middle Dutch ji, northern form of gi, from Old Dutch gī, from Proto-Germanic *jīz, a northwest Germanic variant of *jūz, from Proto-Indo-European *yúHs. Cognate with Low German ji, jie, English ye, West Frisian jimme, German ihr. Until the earlier 20th century, jij was considered exclusively colloquial and hardly appeared in writing. The standard equivalent was the doublet gij. However, the latter’s object and possessive forms u and uw interfered with the polite pronoun u that had developed in the northern Netherlands and this could be odd-sounding e.g. in private letters. Therefore the Hollandic colloquial system (with jij, jou and jullie) came to be fully standardized after WWII. Gij has since been restricted to religious and highly formal contexts in the Netherlands, but remains common in Belgium.