How old was Jacques Natanson in Song of Farewell?

Jean ServaisJean Servais was 22 in Song of Farewell as 'Frédéric Chopin'.

Birthday: Tue, Sep 24 1912 –
Tue, Feb 17 1976

Janine CrispinJanine Crispin was 23 in Song of Farewell as 'Constantia Glodkowska'.

Birthday: Sun, Jun 25 1911 –
Mon, Jun 18 2001

Lucienne Le MarchandLucienne Le Marchand was 25 in Song of Farewell as 'George Sand'.

Birthday: Sun, Nov 15 1908 –
Sun, Feb 09 1992

Géza von BolváryGéza von Bolváry was 36 in Song of Farewell as 'Director'

Birthday: Sun, Dec 26 1897 –
Fri, Aug 11 1961

Albert ValentinAlbert Valentin was >> in Song of Farewell as 'Director'

Birthday: Unknown Birthday

Jacques NatansonJacques Natanson was >> in Song of Farewell as 'Writer'

Birthday: Unknown Birthday

Ernst MarischkaErnst Marischka was 41 in Song of Farewell as 'Writer'

Birthday: Thu, Feb 02 1893 –
Sun, May 12 1963

Jacques ThéryJacques Théry was 53 in Song of Farewell as 'Novel'

Birthday: Wed, Apr 06 1881 –
Tue, Sep 29 1970