It exists a gender API [1] which predict the gender of a personal name on a -1 (Male) to +1 (Female) scale. Examples:

http://api.namsor.com/onomastics/api/gendre/John/Smith

http://api.namsor.com/onomastics/api/json/gendre/Alix/Dupond

http://api.namsor.com/onomastics/api/json/gendre/声涛/周

http://api.namsor.com/onomastics/api/json/gendre/淑珍/張

http://api.namsor.com/onomastics/api/json/gendre/معين/المرعب...

http://api.namsor.com/onomastics/api/json/gendre/Илья/Коваль...

http://api.namsor.com/onomastics/api/json/gendre/בנימין/נתני...

http://api.namsor.com/onomastics/api/json/gendre/Julia/Rober...

http://api.namsor.com/onomastics/api/json/gendre/Olga/Sokolo...

http://api.namsor.com/onomastics/api/json/gendre/Kjell/Bergq...

[1] http://namesorts.com/api/