D.Jun is male
http://www.mangago.me/read-manga/here_u_are/
The authors of http://www.mangago.me/read-manga/yagyuu_hijouken_samon/ (You can't really think of them as "yaoi mangakas" though.)
well you are asking for BL male mangakas after all and i do not know any. but if you are asking for male gay mangakas, the entirety of bara (so it's a different category from yaoi) is created by them.
I thought it was a girl? I mean they represent themself as a woman at the end of chapters...
Sakura Haiji and Kisaragi Hirotaka, but there should few more
Penguin Frontier
Alright, thanks everyone
Title says it all