Answer the question at the end by quoting:

Cast are an English rock band from Liverpool, formed in 1992 by John Power (vocals, guitar) and Peter Wilkinson (backing vocals, bass) after Power left The La's and Wilkinson's former band Shack had split. Following early line-ups with different guitarists and drummers, Liam "Skin" Tyson (guitar) and Keith O'Neill (drums) joined Cast in 1993. Emerging from the Britpop movement of the mid-1990s, Cast signed to Polydor Records and their debut album All Change (1995) became the highest selling debut album for the label. Further commercial success continued with the albums Mother Nature Calls (1997) and Magic Hour (1999), however a departure in sound on the band's fourth album Beetroot (2001) was met by a poor critical and commercial reaction and contributed to the band's split two weeks after its release.
John Power was previously the bass player, backing vocalist and only constant member along with Lee Mavers in The La's. He left the band on 13 December 1991 after becoming frustrated with the ever-increasing number of aborted studio sessions, having played essentially the same set of songs since 1986 and emerging as a songwriter in his own right. Power later commented that by that point he was more interested in his own songs "than anyone else's". Having switched from bass to rhythm guitar whilst residing at Brucklay House - a near derelict squat in Mossley Hill, where the seeds of legendary dance label 3 Beat Records were sown, Power began jamming with friends and with an ever-changing line-up began to form Cast. The first addition to the band was ex-Shack bassist Peter Wilkinson who had seen Power performing acoustically at a free festival in Liverpool, and who Power had seen around town.". Embryonic lineups of the band, featuring several guitarists including Ged Malley, ex-La's members Barry Sutton and Cammy and drummer Russell Brady started gigging in mid 1992 and supported the likes of Pele and The Stairs. Power would later state that he was never happy with these lineups. Unhappy with the band and the demos recorded with Who sound engineer Bob Pridden, he split the band up and extricated himself from his Go! Discs contract in Summer 1993, with whom he was still signed to following his departure from The La's and set about forming a new lineup with Wilkinson. The first new member to be recruited was Keith O'Neill who had previously played in The Empty Hours, The Windmills and Tommy Scott's pre-Space band The Australians and who Power had seen playing in local band The Windmills, fronted by Howie Payne later of The Stands and then guitarist Liam 'Skin' Tyson, who Wilkinson knew from college and had previously played in Pyramid Dream. When approached to join the band, Tyson initially declined as he had sold all of his musical equipment to teach canoeing at an outdoor centre in Alston in Cumbria. Tyson, who witnessed one of the band's early London shows and commented that "John had these songs, but not the band", joined the band in November 1993 and the new lineup played their first gig in Hull in January 1994. Within months the band secured high-profile support slots with Elvis Costello on two UK tours, including 2 nights at the Royal Albert Hall and Oasis. It was during the tour with Oasis that Polydor head of A&R Paul Adam, surprised that the band had not already been snapped up, approached the band to sign them. The band signed to Polydor on 13 December 1994, three years to the day that Power left The La's.

how did they get the band name?

Answer the question at the end by quoting:

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.
From 1936, Ellington began to make recordings with smaller groups (sextets, octets, and nonets) drawn from his then-15-man orchestra and he composed pieces intended to feature a specific instrumentalist, as with "Jeep's Blues" for Johnny Hodges, "Yearning for Love" for Lawrence Brown, "Trumpet in Spades" for Rex Stewart, "Echoes of Harlem" for Cootie Williams and "Clarinet Lament" for Barney Bigard. In 1937, Ellington returned to the Cotton Club which had relocated to the mid-town Theater District. In the summer of that year, his father died, and due to many expenses, Ellington's finances were tight, although his situation improved the following year. After leaving agent Irving Mills, he signed on with the William Morris Agency. Mills though continued to record Ellington. After only a year, his Master and Variety labels, the small groups had recorded for the latter, collapsed in late 1937, Mills placed Ellington back on Brunswick and those small group units on Vocalion through to 1940. Well known sides continued to be recorded, "Caravan" in 1937, and "I Let a Song Go Out of My Heart" the following year. Billy Strayhorn, originally hired as a lyricist, began his association with Ellington in 1939. Nicknamed "Swee' Pea" for his mild manner, Strayhorn soon became a vital member of the Ellington organization. Ellington showed great fondness for Strayhorn and never failed to speak glowingly of the man and their collaborative working relationship, "my right arm, my left arm, all the eyes in the back of my head, my brain waves in his head, and his in mine". Strayhorn, with his training in classical music, not only contributed his original lyrics and music, but also arranged and polished many of Ellington's works, becoming a second Ellington or "Duke's doppelganger". It was not uncommon for Strayhorn to fill in for Duke, whether in conducting or rehearsing the band, playing the piano, on stage, and in the recording studio. The 1930s ended with a very successful European tour just as World War II loomed in Europe.

Did anything specific happen in the later 1930's for Duke?
From 1936, Ellington began to make recordings with smaller groups