Jeffrey G. Drewery, head of the commercial department at Whitaker Entertainment/L.A. Kidz Management, died Aug. 7 due to complications following a brief illness in Torrance. He was 34.At Whitaker, Drewery handled child and adult clients for commercial jobs. Prior to joining the company in 1997, he worked in international film distribution in the contract department at Solomon Intl. Enterprises. Drewery is survived by his parents and two brothers.