Answer by taking a quote from the following article:

Hedwig and the Angry Inch is a rock musical about a fictional rock and roll band fronted by a transgender East German singer, Hedwig Robinson. The book is by John Cameron Mitchell, and the music and lyrics are by Stephen Trask. The story draws on Mitchell's life as the son of a U.S. Army Major General who once commanded the U.S. sector of occupied West Berlin. The character of Hedwig was inspired by a German divorced U.S. Army wife who was a Mitchell family babysitter and moonlighted as a prostitute at her Junction City, Kansas, trailer park home.

The character of Hedwig was originally a supporting character in the piece. She was loosely inspired by a German female babysitter/prostitute who worked for Mitchell's family when he was a teenager in Junction City, Kansas. The character of Tommy, originally conceived as the main character, was based on Mitchell himself: both were gay, the sons of an army general, deeply Roman Catholic, and fascinated with mythology. Hedwig became the story's protagonist when Trask encouraged Mitchell to showcase their earliest material in 1994 at NYC's drag-punk club Squeezebox, where Trask headed the house band and Mitchell's boyfriend, Jack Steeb, played bass.  They agreed the piece should be developed through band gigs in clubs rather than in a theater setting in order to preserve a rock energy. Mitchell was deeply influenced by Squeezebox's roster of drag performers who performed rock covers. The setlists of Hedwig's first gigs included many covers with lyrics rewritten by Mitchell to tell Hedwig's story: Fleetwood Mac's "Oh Well"; Television's "See No Evil"; Wreckless Eric's "Whole Wide World"; Yoko Ono's "Death of Samantha"; Pere Ubu's "Non-Alignment Pact"; Cher's "Half Breed"; David Bowie's "Boys Keep Swinging"; Mott the Hoople's "All the Young Dudes"; and the Velvet Underground's "Femme Fatale." A German glam rendition of Debby Boone's "You Light Up My Life" once served as the musical's finale.  Mitchell's second gig was as fill-in host at Squeezebox on a bill featuring singer Deborah Harry of Blondie. It was for this occasion that Mike Potter first designed Hedwig's trademark wig, which was initially constructed from toilet paper rolls wrapped with synthetic blond hair. Mitchell, Trask, and the band Cheater (Jack Steeb, Chris Wielding, Dave McKinley, and Scott Bilbrey) continued to workshop material at venues such as Fez Nightclub and Westbeth Theater Center for four years before premiering the completed musical Off-Broadway in 1998.  Mitchell has explained that Hedwig is not a trans woman, but a genderqueer character. "She's more than a woman or a man," he has said. "She's a gender of one and that is accidentally so beautiful."

What was her name?
The character of Tommy, originally conceived as the main character, was based on Mitchell himself: