yes
Mark J. Ablowitz was born in 1945.
James J. Andrews - mathematician - died in 1998.
James J. Andrews - mathematician - was born in 1930.
Homi J Bhabha was a nuclear physicist, who studied mathematics during his education. This could mean that he was a mathematician, yes.
Mark J. Eyerman has written: '\\'
Mark J. Alexander died in 2004.
Mark J. Alexander was born in 1911.
Mark J. Kilroy died in 1989.
Mark J. Blechner was born in 1950.
Mark J. Hudson was born in 1963.
Mark J. Lewis was born in 1962.
Mark J. Machina was born in 1954.