|Fantasy game art from Dragon Age: Origins Ultimate Edition (Dragon Age: Origins, the Awakening expansion, and all official Downloadable Content).
Hurlocks are darkspawn born from BroodMothers that were once female humans.
From Codex entry: Hurlock:
Taller than their genlock cousins, the hurlocks are roughly of human-size but are possessed of considerable strength and constitution. The shock troop of the darkspawn, a single berserking hurlock can often be a match for numerous opponents at once. They are known to adorn themselves with roughly-carved tattoos to keep track of their kills and deeds, though it is unknown whether or not there is a uniform standard to these markings.
Alpha hurlocks [hurlock vanguards] are more intelligent and more skilled fighters, often serving as commanders or even generals.
Hurlock emissaries have also been known to appear during a Blight. These darkspawn are the only ones recorded as being capable of human speech and are often capable of employing magic.