Hi Ger,
I believe I can help.
Immediately prior to the Truce, B Coy. 4th. Battn. Dublin Brigade Old IRA was under the command of Capt. Ben Brady. Second and third in command was 1st. Lieut. Brian Leahy and 2nd. Lieut. Mick Gaynor.
I am aware that of the nine names you mentioned seven were members of B Coy.. The exceptions are P. Lanigan of whom I have no information and M. White. According to my sources, there were two members called White, Ed and Peter.
If you let me know the specific details you require, I will try to assist further. I hold the Roll of B Coy.
If the information you quote is from a publication, I would be very interested to know the source, as I am a son of a member. (I am probably correct in stating that I belong to an older generation than you!)
Regards,
Padraic