Irina, also known as Leshawna Sharpe, was found dead outside of her residence in Los Angeles in 2015. Her death was ruled a homicide due to blunt force trauma.
Irina Spasky does die in 39 Clues #6, In Too Deep.
Irina Godunova died in 1603.
Irina Sebrova died in 1948.
Irina Press died in 2004.
Irina Bugrimova died in 2001.
Irina Mazing died in 1994.
Irina Yusupova died on 1983-08-30.
Irina Saburova died on 1979-11-22.
Irina Belotelkin died on 2009-01-21.
Irina Gabashvili died on 2009-03-23.
Irina Baldina died on 2009-01-15.
Irina Arkhipova died on 2010-02-11.