Answer the question at the end by quoting:

Vaslav Nijinsky (also Vatslav; Russian: Vatslav Fomich Nizhinskii; Russian: ['vatsl@f f@'mjitc njI'zinskjIj]; Polish: Waclaw Nizynski; 12 March 1889/1890 - 8 April 1950) was a ballet dancer and choreographer cited as the greatest male dancer of the early 20th century.
Vaslav Nijinsky was born in 1889 or 1890 in Kiev, Russian Empire (now Ukraine), as Waclaw Nizynski, to ethnic Polish parents, touring dancers Tomasz Nizynski (b. 7 March 1862) and Eleonora Bereda (b. 28 December 1856). Nijinsky was christened in Warsaw. He identified himself as Polish although he grew up in the interior of Russia with his parents and he had difficulty speaking Polish.  Eleanora, along with her two brothers and two sisters, was orphaned while still a child. She started to earn a living as an extra in Warsaw's Grand Theatre Ballet (Polish: Teatr Wielki), becoming a full member of the company at age thirteen. In 1868 her talent was spotted and she moved to Kiev as a solo dancer. Tomasz Nizynski also attended the Wielki Theatre school, becoming a soloist there. At age 18 he accepted a soloist contract with the Odessa Theatre. The two met, married in May 1884 and settled into a career with the traveling Setov opera company. Tomasz was premier danseur, and Eleanora a soloist. Eleanora continued to tour and dance while having three children, sons Stanislav Fomitch (b. 29 December 1886 in Tiflis) and Vaslav; and daughter Bronislava Fominitchna ('Bronia', b. 8 January 1891 in Minsk). She suffered from depression, which may have been a genetic vulnerability shared in a different form by her son Vaslav. Both boys received training from their father and appeared in an amateur Hopak production in Odessa in 1894.  After Josef Setov died about 1894, the company disbanded. Thomas attempted to run his own company, but was not successful. He and his family became itinerant dancers, the children appearing in the Christmas show at Nizhny Novgorod. In 1897 Thomas and Eleanora separated after Thomas had fallen in love with another dancer, Rumiantseva, while touring in Finland. Eleanora moved to 20 Mokhovaya Street in St Petersburg with her children. She persuaded a friend from the Wielki Theatre, Victor Stanislas Gillert, who was at the time teaching at the Imperial Ballet School, to help get Vaslav into the school. He arranged for the noted teacher Enrico Cecchetti to sponsor the application. Bronia entered the school two years after Vaslav. Their older brother Stanislav had suffered a fall from a window when young and seemed to have suffered some brain damage. Vaslav and Bronia, just two years apart, became very close as they grew. As he got older, Stanislav became increasingly mentally unstable and would have fierce tantrums. He was admitted to an asylum for the insane in 1902.

What was his childhood like?

Vaslav and Bronia, just two years apart, became very close as they grew.

IN: Ellington was born on April 29, 1899, to James Edward Ellington and Daisy (Kennedy) Ellington in Washington, D.C. Both his parents were pianists. Daisy primarily played parlor songs and James preferred operatic arias.

When his drummer Sonny Greer was invited to join the Wilber Sweatman Orchestra in New York City, Ellington made the fateful decision to leave behind his successful career in Washington, D.C., and move to Harlem, ultimately becoming part of the Harlem Renaissance. New dance crazes such as the Charleston emerged in Harlem, as well as African-American musical theater, including Eubie Blake's Shuffle Along. After the young musicians left the Sweatman Orchestra to strike out on their own, they found an emerging jazz scene that was highly competitive and hard to crack. They hustled pool by day and played whatever gigs they could find. The young band met stride pianist Willie "The Lion" Smith, who introduced them to the scene and gave them some money. They played at rent-house parties for income. After a few months, the young musicians returned to Washington, D.C., feeling discouraged.  In June 1923, a gig in Atlantic City, New Jersey, led to a play date at the prestigious Exclusive Club in Harlem. This was followed in September 1923 by a move to the Hollywood Club - 49th and Broadway - and a four-year engagement, which gave Ellington a solid artistic base. He was known to play the bugle at the end of each performance. The group was initially called Elmer Snowden and his Black Sox Orchestra and had seven members, including trumpeter James "Bubber" Miley. They renamed themselves The Washingtonians. Snowden left the group in early 1924 and Ellington took over as bandleader. After a fire, the club was re-opened as the Club Kentucky (often referred to as the Kentucky Club).  Ellington made eight records in 1924, receiving composing credit on three including "Choo Choo". In 1925, Ellington contributed four songs to Chocolate Kiddies starring Lottie Gee and Adelaide Hall, an all-African-American revue which introduced European audiences to African-American styles and performers. Duke Ellington and his Kentucky Club Orchestra grew to a group of ten players; they developed their own sound by displaying the non-traditional expression of Ellington's arrangements, the street rhythms of Harlem, and the exotic-sounding trombone growls and wah-wahs, high-squealing trumpets, and sultry saxophone blues licks of the band members. For a short time soprano saxophonist Sidney Bechet played with them, imparting his propulsive swing and superior musicianship to the young band members.

Did any person aid him in his early career?

OUT:
Ellington made the fateful decision to leave behind his successful career in Washington, D.C., and move to Harlem, ultimately becoming part of the Harlem Renaissance.