Kaddish when there is no male chiyuv

If one has no male children, his grandson or a son in law can say Kaddish. Another option is that his brothers say Kaddish or that someone is hired to say Kaddish.

In Prague the Minhag was that a woman would say Kaddish in such a case, standing in a room where she could be heard in Shul and where there were no Men. But this was not done in Ashkenaz.

Michael FRBSH