Jan-David Rönfeldt is a German voice actor, actor, and dialogue director, recognized for his extensive work in dubbing for film, television, and video games, particularly in the anime genre. He was born on 2 September 1974 in Hamburg, Germany. Rönfeldt began his career as a voice actor in 1986 at the age of twelve and has also worked as a commercial spokesman since 1996. Since 2001, he has been active in Berlin as a dialogue director, overseeing the German dubbing of various productions.

Rönfeldt's voice is well-known to German anime audiences through numerous prominent roles. He provides the German voice for the enigmatic Joker in the series Fire Force. In the Dragon Ball Super: Super Hero film, he voices the character Magenta. He is also the German voice of the powerful ninja Kurogane in Tsubasa Chronicle and Tsubasa Tokyo Revelations, a role for which he was the German counterpart to the Japanese voice actor Tetsu Inada. His work in the Naruto universe includes voicing Genma Shiranui in both Naruto and Naruto Shippūden. Other notable anime roles include Dante in Devil May Cry, Bob Makihara in Tenjo Tenge, Zero Kiryuu in Vampire Knight, and Gin in the long-running series Detektiv Conan. He has also lent his voice to the Bakugan Battle Brawlers franchise as Jake Vallory, and to the series Heat Guy J as Tom Yunk. While specific records for every listed role, such as the narrator in Back Street Girls: Gokudols, are not detailed in the available search results, his extensive anime filmography is well-documented.

Beyond anime, Rönfeldt has established himself as a prominent voice for numerous international actors. He is the recurring German dubbing voice for Scott Adkins, Snoop Dogg, and Chris "Ludacris" Bridges. His film dubbing work includes voicing Michael B. Jordan's character Erik Killmonger in Black Panther, Tej Parker in the Fast & Furious film series, and Officer Rigg in the Saw franchise. He is also the German voice of Bradley Cooper's character, Rocket Raccoon, in Marvel Cinematic Universe projects. In the realm of video games, his notable performances include James Vega in Mass Effect 3, Lincoln Clay in Mafia III, and Placide in Cyberpunk 2077.

A recurring theme in Rönfeldt's career is his frequent collaboration with specific actors, becoming their de facto German voice. This is most evident with actors like Scott Adkins, Snoop Dogg, and Ludacris, for whom he provides voice work across multiple films and projects. His work is characterized by a wide vocal range, suitable for characters with a suggested age of 36 to 70, and he is also noted for his ability to perform various dialects and accents. A notable achievement in his career is his long-standing work as a dialogue director, a role he has held since 2001, which places him in a position of creative leadership in the dubbing process for German-language versions of international media.