List of ped spawn codes along with their names:

a_m_y_delta_01 (Male Civilian)
ig_elfguard_01 (Elite Legal Force Guard)
ig_fast_01 (Male Fast)
s_f_y_wvcop_01 (Female State Trooper)
s_f_y_wvsheriff_01 (Female Sheriff)
s_m_m_gendarmerie_01 (Male Gendarmerie)
s_m_m_wvparamedic_01 (Male Paramedic)
s_m_y_wvcop_01 (Male State Trooper)
s_m_y_wvfireman_01 (Male Fireman)
s_m_y_wvsheriff_01 (Male Sheriff)
u_m_m_elfjuggernaut_01 (Elite Legal Force Juggernaut)