I'll repeat that again.

Be aware that there are Irish mathematicisn who share names and sometimes also
areas of interest.  They can sometimes be distinguished by middle names or
initials.

Examples include:

Michael Hayes x 2 
Michael Tuite x 2 
Patrick Browne x 2
Patrick Fitzpatrick x 2
John McDermott x 2
John Murray x 2
Brendan Murphy x 2