Question: Who did Gisela Antonia Brož know that was raised in an American circus family of Irish background?

Context paragraphs:
Circus train: A circus train is a method of conveyance for circus troupes.  One of the larger users of circus trains was the Ringling Bros. and Barnum & Bailey Circus (RBBX), a famous American circus formed when the Ringling Brothers Circus purchased the Barnum and Bailey Circus in 1907.

Victor Pépin: Victor Adolphus Pépin (March 8, 1780 – 1845) was an American circus performer and circus owner most famous for being a partner in the Circus of Pépin and Breschard.  The Circus of Pépin and Breschard can thus be considered the first American circus and Pépin the first American circus impresario.

John Madigan (ringmaster): John Adalbert Madigan, (12 August 1850 - 23 August 1897) was an American circus performer and ringmaster, during the later years of his life he worked in Scandinavia.  He was raised in an American circus family of Irish background.  He is known for his work in U.S circus scenes between 1866 and 1869, but from 1872 he worked at Cirkus Myers in Central Europe.  To this circus, the Swedish-Norwegian circus artist Eleonora Olsen, later known as Laura Madigan (mother of Elvira Madigan) came to work in 1875, the two became a couple.

Gisela Brož: Gisela Antonia Brož (Brosch) (also sometimes referred to as Gisela Madigan), (4 April 1865 - 1945) was an Austrian-American circus performer, tight rope dancer, and clown.  Her parents were shoemaker Joseph Brož and his wife Maria.  She went to convent school in Siebenbürgen and at the age of 15 she got to know the circus family Madigans with John and Laura who at that time toured with circus Krembser in Vienna.  Gisela became their foster child and got to learn tight rope dancing, this along with the couple's two year younger daughter Elvira Madigan.

American Circus Corporation: The American Circus Corporation consisted of the Sells-Floto Circus, the Hagenbeck-Wallace Circus, the John Robinson Circus, the Sparks Circus, and the Al G. Barnes Circus.  It was owned by Jerry Mugivan, Bert Bowers and Ed Ballard.  They sold the company in 1929 to John Nicholas Ringling for $1.7 million ($ today).  With that acquisition, Ringling owned virtually every traveling circus in America.

Pickle Family Circus: The Pickle Family Circus was a small circus founded in 1974 in San Francisco, California, United States.  The circus formed an important part of the renewal of the American circus.  They also influenced the creation of Cirque du Soleil in Montreal.  Neither circus features animals or use the three-ring layout like the traditional circus.

Josh Routh: Josh Routh is a nationally recognized American circus performer, and a founding member of the comedic troop Brothers Kaputnik, Death By Tickle and Circus Kaput.  Josh trained at the Circus Center in San Francisco, California and attended the Clown Conservatory where he graduated "Class Clown".  The Conservatory is where Josh found his alter ego "Tchotchke Kaputnik".  As Tchotchke, Josh has performed with The New Pickle Circus (formerly the Pickle Family Circus, The San Francisco Youth Circus, The Much Ado Shakespeare Circus and Velocity Circus.

La Bonche: The Circus family name La Bonche was created in March 2012.  It describes the participants of a North East of England-based youth Circus called Five Ring Circus.  In March 2013 the Heritage Lottery Fund awarded a Young Roots grant to support the Five Ring Circus to research the Arthur Fenwick Collection of Circus ephemera at Tyne & Wear Archives & Museums, and to collect material from 1960 - to date on North East of England circus.

Josser: A Josser is someone who was not born into a circus family, nor married into a circus family, but is in a circus nonetheless.  The term is also used (rarely) to refer to a clergyman (Australia), or even more generally, a fool or a simpleton (Britain).

Dolly Jacobs: Dolly Jacobs (born c. 1957 in Sarasota, Florida) is an American circus aerialist.  She is the daughter of famed circus clown Lou Jacobs and former New York fashion model turned circus performer Jean Rockwell Jacobs.  She began her circus career in 1975 and has been working ever since.  She was a featured performer with Ringling Brothers and Barnum and Bailey Circus.  She and her husband, fellow circus performer Pedro Reis, founded Circus Sarasota in 1997.  In 2012, she received the Florida Folk Heritage Award, and in 2015, was awarded a National Heritage Fellowship award by the National Endowment for the Arts.

Supporting paragraphs: Gisela Brož John Madigan (ringmaster)
Answer: John Adalbert Madigan