A copper coin of Spain which probably received its name from Jacca or Xaca, the old capital of Aragon. It is referred to in ordinances of the fourteenth century, but Engel and Serrure (ii. 824) state that it was origin- ally struck by Sanzio Ramirez I (1063- 1094).
The Lira Jaquesa or Lira Aragonese was a money of account used in Spain at the beginning of the nineteenth century and was computed at ten Reales.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)