Male opera composers

Gerónimo Giménez y Bellido (10 October 1854 – 19 February 1923) was a Spanish conductor and composer, who dedicated his career to writing zarzuelas, such as La tempranica and La boda de Luis Alonso. He preferred to spell his first name with a "G", even though his name at birth officially began with a "J".
Written in Spanish, a very comprehensive biographical exposition by Ascensión García de las Mozas may be found at the Universidad de Cádiz institutional repository of Research and Learning Objects (RODIN)
https://rodin.uca.es/bitstream/handle/10498/7788/33195031.pdf?sequence=1

Felip Pedrell Sabaté (Spanish: Felipe) (19 February 1841 – 19 August 1922) was a Catalan composer, guitarist and musicologist.

Philippe Hersant (born 21 June 1948 in Rome) is a French composer. He studied at the Conservatoire de Paris.

Paul Pierné (30 June 1874 – 24 March 1952) was a French composer and organist.

Antonino Gandolfo Brancaleone (24 April 1820, in Catania – 6 June 1888, in Catania) was an Italian composer. His masterpiece was Il Sultano (1851).

Waldemar Edler von Baußnern (also Baussnern or Bausznern; 29 November 1866 – 20 August 1931) was a German composer and music teacher.

Daniel Gottlieb Steibelt (22 October 1765 – 2 October [O.S. 20 September] 1823) was a German pianist and composer. His main works were composed in Paris and in London, and he died in Saint Petersburg, Russia.

Louis-Aimé Maillart (March 24, 1817 – May 26, 1871) was a French composer, best known for his operas, particularly Les Dragons de Villars and Lara.

André Alphonse Toussaint Wormser (1 November 1851 – 4 November 1926) was a French Romantic composer.

Gustav Albert Lortzing (23 October 1801 – 21 January 1851) was a German composer, librettist, actor and singer. He is considered to be the main representative of the German Spieloper, a form similar to the French opéra comique, which grew out of the Singspiel.