Question: What was the nickname of Avril Coleridge-Taylor's father?

Context paragraphs:
Jovo Stanisavljević Čaruga: Jovan "Jovo" Stanisavljević (; 1897–27 February 1925), known by his nickname Čaruga (Чаруга), was an outlaw ("hajduk") in Slavonia in the early 20th century.  Stanisavljević was born in 1897, into a Serb Orthodox family in the village of Slavonske Bare (part of Zdenci) in the Virovitica County, autonomous Kingdom of Croatia-Slavonia, Austro-Hungary.  He was named after his paternal grandfather Jovan, who went by the family nickname of "Čaruga" ("troublemaker").  His father Prokopija was a peasant, and his mother "Ika" died when he was ten.  His father remarried, and he had a tough upbringing, later running away from home to Osijek, where he went to a locksmith school.  When World War I broke out, he stopped his studies and enrolled in the Austro-Hungarian Army.  However, he posed as an officer and deserted the front lines.  Shortly afterwards, he killed a man who was courting his girlfriend, and after a local nobleman threatened to arrest him, he killed him too.  He was eventually apprehended, tried, and convicted, and started serving his sentence in the Sremska Mitrovica penitentiary.  He managed to escape from prison and had a warrant for his capture, returning home where he was unwelcomed.  Čaruga left for the woods, where he befriended a gang, "Kolo gorskih tića" ("Band of Mountain Birds"), composed mostly of deserters, who all detested the rich Slavonian peasants and robbed them mercilessly, and were not afraid of killing people.  He used the false names Nikola Drezgić and Mile Barić.  The war was long over, but Čaruga and the gang were still pillaging the countryside, and became hunted by the Yugoslav gendarmerie.  Eventually in 1922 he decided to leave for Zagreb, where he posed as a rich gentleman from Vinkovci and also continued his life of thievery.  He would later return to Slavonia to continue stealing together with his group members.  On 14 October 1923, however, they attempted to rob the Eltz family estate in Ivankovo near Vinkovci.  They killed a man on site, while another snuck out and called the gendarmerie.  After the skirmish that ensued they managed to escape but without their loot.  More importantly, the police got on their trail and soon captured them.  By February 1925, Čaruga's trial at the court in Osijek was finished, and he was subsequently hanged in front of a crowd of 3,000.

Yang Jian (Sui prince): Yang Jian (; 585–618), courtesy name Shiku (世胐), nickname Ahai (阿孩), was an imperial prince of the Chinese Sui Dynasty.  During the reign of his father Emperor Yang, he carried the title of Prince of Qi.  When his father was killed in a coup led by the general Yuwen Huaji in 618, Yang Jian and his sons were also killed.

Michael Gerald Ford: Michael Gerald Ford (born March 14, 1950) is the oldest of four children of U.S. President Gerald R. Ford and Betty Ford.  Prior to his birth, Ford's mother wanted to name him after his father.  However, Ford's father had always disliked being called "Junior" and he refused to "inflict the nickname on any son."  The Fords settled on his name as a compromise.

Damian Marley: Damian Robert Nesta "Jr.  Gong" Marley (born 21 July 1978) is a Jamaican reggae artist.  Damian is the youngest son of reggae legend Bob Marley.  Damian was 2 years old when his father died; he is the only child born to Marley and Cindy Breakspeare, Miss World 1976.  Damian's nickname "Junior Gong" is derived from his father's nickname of "Tuff Gong."  Damian has been performing since the age of 13.

Superior General of the Society of Jesus: The Superior General of the Society of Jesus is the official title of the leader of the Society of Jesus – the Roman Catholic religious order which is also known as the Jesuits.  He is generally addressed as Father General.  The position sometimes carries the nickname of the Black Pope, because of his responsibility for the largest Catholic, male religious order and as contrasted to the white garb of the Pope.  The thirty-first and current Superior General is the Reverend Father Arturo Sosa, elected by the 36th General Congregation on October 14, 2016.

Tad Lincoln: Thomas "Tad" Lincoln III (April 4, 1853 – July 15, 1871) was the fourth and youngest son of Abraham and Mary Todd Lincoln.  The nickname "Tad" was given to him by his father, who found him "as wiggly as a tadpole" when he was a baby.  Lincoln was known to be impulsive and unrestrained, and he did not attend school during his father's lifetime.  He had free run of the White House, and there are stories of him interrupting presidential meetings, collecting animals, and charging visitors to see his father.  He died at the age of 18 on July 15, 1871, in Chicago.

Avril Coleridge-Taylor: Gwendolyn Avril Coleridge-Taylor (8 March 190321 December 1998) was an English pianist, conductor, and composer.  She was the daughter of composer Samuel Coleridge-Taylor and his wife Jessie (née Walmisley).

Samuel Coleridge-Taylor: Samuel Coleridge-Taylor (15 August 18751 September 1912) was an English composer and conductor who was mixed-race; his father was a Sierra Leone Creole physician.  Coleridge-Taylor achieved such success that he was referred to by white New York musicians as the "African Mahler" at the time when he had three tours of the United States in the early 1900s.  He was particularly known for his three cantatas based on the epic poem, "Song of Hiawatha" by American Henry Wadsworth Longfellow.  Coleridge-Taylor premiered the first section in 1898, when he was 22.

Espen Knutsen: Kjell Espen Knutsen Jahre (born January 12, 1972) is a retired Norwegian professional ice hockey player and currently the general manager of Vålerenga in the Norwegian GET-ligaen.  He played five seasons in the North American-based National Hockey League (NHL), and is to date the only Norwegian to have played in the NHL All-Star Game.  In his native Norway, Knutsen is also known by the nickname "Shampoo" because his father is a hairdresser, and also a former hockey player whose nickname was "The Soap" (Såpa in Norwegian).

Paul Chua: Paul Chua (born September 2, 1941 in Singapore) his mother and father gave a nickname for him that is suited to his looks, his parents gave him the nickname jograt di mapisil.  Paul Chua is an internationally renowned bodybuilding official.  Having worked his way up as a small-time unionist and secretary of an insignificant badminton club in Singapore, Chua used his political skills to worm his way up to the highest echelons of the IFBB.

Supporting paragraphs: Avril Coleridge-Taylor Samuel Coleridge-Taylor
Answer: "African Mahler"