Lord Haw-Haw - Wikipedia

On September 18, 1939, William Joyce's first Nazi propaganda broadcast began. From the article:

"The English language propaganda radio programme Germany Calling was broadcast to audiences in the United Kingdom on the medium wave station Reichssender Hamburg and by shortwave to the United States. The programme began on 18 September 1939 and continued until 30 April 1945, when the British Army overran Hamburg. The next scheduled broadcast was made by Horst Pinschewer (aka, Geoffrey Perry), a German refugee serving in the British Army who announced the British takeover. Pinschewer was later responsible for the capture of William Joyce.[1]

Through such broadcasts, the Reich Ministry of Public Enlightenment and Propaganda attempted to discourage and demoralise American, Australian, British, and Canadian troops, and the British population, to suppress the effectiveness of the Allied war effort through propaganda, and to motivate the Allies to agree to peace terms leaving the Nazi regime intact and in power. Among many techniques used, the Nazi broadcasts reported on the shooting down of Allied aircraft and the sinking of Allied ships, presenting discouraging reports of high losses and casualties among Allied forces. Although the broadcasts were well known to be Nazi propaganda, they frequently offered the only details available from behind enemy lines concerning the fate of friends and relatives who did not return from bombing raids over Germany. As a result, Allied troops and civilians frequently listened to Lord Haw-Haw's broadcasts despite the sometimes infuriating content and frequent inaccuracies and exaggerations, in the hopes of learning clues about the fate of Allied troops and air crews.[2] Mass Observation interviews warned the Ministry of Information of this; consequently, more attention was given to the official reports of British military casualties.[3]

Origin of the name
Radio critic Jonah Barrington of the Daily Express applied the phrase in describing a German broadcaster,[4] in an attempt to reduce his possible impact: "He speaks English of the haw-haw, dammit-get-out-of-my-way-variety".[5][6] In practice, the name probably came from the announcers using such verbiage as "So you English believe that you can defeat the superior German forces! Haw, Haw," a low-brow putdown obviously meant as a discouragement to the opposition. The "Haw, Haw" name reference was then applied to a number of different announcers and, even soon after Barrington coined the nickname, it was uncertain exactly which specific German broadcaster he was describing.[7] Some British media and listeners just used "Lord Haw-Haw" as a generic term to describe all English-language German broadcasters, although other nicknames, like "Sinister Sam", were occasionally used by the BBC to distinguish between obviously different speakers. Poor reception may have contributed to some listeners' difficulties in distinguishing between broadcasters.[8]

In reference to the nickname, American pro-Nazi broadcaster Fred W. Kaltenbach was given the moniker Lord Hee-Haw by the British media.[9] The Lord Hee-Haw name, however, was used for a time by The Daily Telegraph to refer to Lord Haw-Haw, generating some confusion between nicknames and broadcasters.[10]"