Zephyrus was a slavemaster who, in 1100 BBY, outfitted the slave caravel Sickly Tremor with durasteel cages to bring slaves he claimed could heft a cargo skiff in one hand to Ovise III. However, the shipment never arrived, and Zephyrus's fate remained a mystery, although it was theorized his ship crashed on Endor, and that the slaves he boasted of were ancestors of the moon's Phlog population.
Sources
Castaways of Endor on Hyperspace (article) (content obsolete and backup link not available) (First mentioned)