dubbeltje

Etymology
From.

Noun

 * 1)  A former Dutch coin, originally of silver, worth one tenth of a guilder.
 * 2)  An English penny, worth the same as the Dutch coin.

Etymology
Already attested in the 17th century. From. Named for having twice the value of a.

Noun

 * 1) Dutch coin of 10 cents (0.10 guilders or euros)