Plunderer

• Blame at expected level over extremely elusive old Irish robber

Wikipedia Word definitions in Wikipedia
Rapparees or raparees (from the Irish ropairí , plural of ropaire , meaning half-pike or pike-wielding person) were Irish guerrilla fighters who operated on the Jacobite side during the 1690s Williamite war in Ireland . Subsequently the name was also given ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Rapparee \Rap`pa*ree"\ (-p[.a]*r[=e]"), n. A wild Irish plunderer, esp. one of the 17th century; -- so called from his carrying a half-pike, called a rapary.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"Irish freebooter," 1680s, originally "pikeman," from Irish rapairidhe , plural of rapaire "half-pike." Kind of soldier prominent in the war of 1688-92.

Wiktionary Word definitions in Wiktionary
n. A bandit or brigand.