We report an efficient operation of a kilohertz nanosecond extracavity KGd(WO4)(2) (KGW) crystal Raman yellow laser, which is pumped by a 532 nm lasers based on pulse laser diode (LD) side-pumped ceramic Nd: YAG, BBO electro-optical Q-switched and LBO crystal extracavity frequency doubling. With the 5 W, 10 ns and 1 kHz output power pumped at 532 nm, we obtained 2.58 W, 7.4 ns, 1 kHz second Stokes Raman laser output at 579.54 nm for 768 cm(-1) Raman shift of KGW crystal, corresponding to a conversion efficiency of 51.4%. By changing the KGW crystal orientation, we further obtained 3.18 W, 7.8 ns, 1 kHz Raman pulses at 588.33 nm for 901 cm(-1) Raman shift, corresponding to a conversion efficiency of 63.3%. The beam quality factors M-2 of 579.54 and 588.33 nm were (M (x-579.54) (2) = 5.829, M (y-579.54) (2) = 6.336) and (M (x-588.33) (2) = 6.405, M (y-588.33) (2) = 6.895), respectively.