1919: Asociatia Nationala a Surzilor din România (ANSR) Romanian National Association for the Deaf

The first group of persons with hearing impairment in Romania was established on November 9, 1919 and was called the Friendly Association of the Deaf-Mute in Romania, under the patronage of Queen Mary, through the voluntary association of a group of deaf.

In 1995, within the National Conference it was decided that the name of the association be “Romanian National Association of the Deaf”, a name that it honors nowadays.

1922: Eesti Kurtide Liit Estonian Association of the Deaf

The Estonian Society of the Deaf was founded in 1922 in Tallinn when the articles of association had been prepared, reviewed and a founding permit had been obtained.

1922: Sveriges Dövas Riksförbund (SDR), Swedish National Association of the Deaf

SDR was formed on February 26, 1922. Before the formation of SDR, there was the Deaf-Mute Association in Stockholm, which was formed in 1868 by three founders.

1924 - 2003: Alexander Lobanov (RU)

Alexander Pavlovich Lobanov (Russian: Алекса́ндр Па́влович Лоба́нов; 30 August 1924 – April, 2003) was a Russian outsider artist. Born in Mologa (Russia) in 1924, Lobanov contracted meningitis before five years old and was left deaf and mute. 

For over fifty years he produced hundreds of works with very little variety in style or content.

1924: First World Games for the Deaf

The Deaflympics (previously called World Games for the Deaf, and International Games for the Deaf) are an International Olympic Committee (IOC)-sanctioned event at which deaf athletes compete at an elite level.

The games have been organized by the Comité International des Sports des Sourds (CISS, "The International Committee of Sports for the Deaf") since the first event in 1924.

The first games, held in Paris in 1924, were also the first ever international sporting event for athletes with a disability. The event has been held every four years since, apart from a break for World War II, and an additional event, the Deaflympic Winter Games, was added in 1949. 

1926 - 2009: Mario D'Agata (IT)

Mario D'Agata (29 May 1926 – 4 April 2009) was an Italian professional boxer, who was the first, and so far only, deaf world champion in boxing. 

1927 - 1989: Malcolm J. Norwood – The Father of Closed Captioning

As television developed in the 1950s and 1960s the deaf were virtually left out.  As the head of DCMP, Norwood became a leading advocate for the development of closed captioning on television and was singularly responsible for popularizing the captioning technique now used in television.  

1927: Deutscher Gehoerlosen-Bund e.V. (DGB) German Association of the Deaf

The German Deaf Association was founded in 1950. It regards itself as the legal successor to the Reich Association of the Deaf of Germany (ReGeDe), founded in 1927, which was renamed the Reich Association of the Deaf of Germany in 1940 during the Nazi era and was merged into the German Association of the Deaf and Speech Impaired (DGS) in 1943.

1928 - ..: Peter Dimmel, Sculptor (AT)

Peter Hans Dimmel (born August 31, 1928 in Vienna) is an Austrian sculptor and functionary in various deaf interest groups. His life's work includes more than 170 works, including many sculptures and restoration work for churches, especially with the material bronze.

1930 - 1945: The Deaf in the Nazi Era (film)

"With excerpts from the film "Misunderstood People" from 1932 as well as other documents and stories from contemporary witnesses, the German Deaf Association produced a new, one-hour film in 2013 entitled "The Deaf in the Nazi Era". 

This film shows how the diversity of the deaf community in Germany and especially in Berlin was gradually destroyed during the Nazi era.

1931 - 1993: Dorothy "Dot" Miles, Poet and Activist (UK)

Dorothy "Dot" Miles (19 August 1931 – 30 January 1993) was a poet and activist in the deaf community. Throughout her life, she composed her poems in English, British Sign Language, and American Sign Language. Her work laid the foundations for modern sign language poetry in the US and UK.

She is regarded as the pioneer of BSL poetry and her work influenced many contemporary Deaf poets.

1934: СЪЮЗ НА ГЛУХИТЕ В БЪЛГАРИЯ (SGB) Union of the Deaf in Bulgaria

The Union of the Deaf in Bulgaria is the successor of the former Society of the Deaf and Dumb in Bulgaria, which was founded on July 12, 1934.