Question: Are both Matt and Kim and Jem Welsh musicians?

Context articles: Jem Evans
Mikey Welsh
Finally Woken
Mickey Gee
Matt and Kim
Jem (singer)
Hey (Andreas Bourani album)
Jem Cohen
Glass Pear
Matt McCoy (worship leader)

Owen James 'Jem' Evans (1867 - 14 October 1942) was a Welsh rugby union half-back who played club rugby for Cardiff and international rugby for Wales.
 Evans was one of the earliest half-backs to play for Wales and was awarded four caps between 1887 and 1888, though never with the same partner.
Michael Edward "Mikey" Welsh (April 20, 1971 – October 8, 2011) was an American artist and musician, best known as the former bassist of Weezer.
 He played with Weezer frontman Rivers Cuomo during Cuomo's time in Boston during the hiatus in the band Homie.
 Following original bassist Matt Sharp's decision to leave Weezer to focus on his group, The Rentals, Welsh was chosen to take over on bass.
 Welsh played with Weezer from the time that they unofficially regrouped in 1998 until August 2001, when he suffered a mental breakdown.
 Shortly afterwards, he retired from music to focus on his art career.
 Welsh died on October 8, 2011.
Finally Woken is the debut studio album by Welsh singer-songwriter Jem, released initially in the United States on 23 March 2004, with ATO Records.
Michael Richard 'Mickey' Gee (3 July 1944 – 21 January 2009) was a rock and roll guitarist who played alongside some of the most prominent Welsh musicians of the last forty years.
Matt and Kim (sometimes stylized Matt & Kim) are an American indie electronic duo from Brooklyn, New York.
 The group formed in 2004 and consists of Matt Johnson (vocals/keyboards) and Kim Schifino (drums).
 The duo is known for its upbeat dance music and energetic live shows which often incorporate samples from other artists.
 Although they started their career playing shows in lofts and other close-quarters venues, they have since performed at numerous festivals, including Bonnaroo, Coachella, and the Firefly Music Festival.
Jemma Griffiths (born 18 May 1975), known by her stage name Jem, is a Welsh singer, songwriter, and record producer.
 Born and raised in Penarth, Wales, she began songwriting at an early age.
 After graduating university in 1996 she worked as a DJ as well as co-founder of record label Marine Parade in Brighton.
 By 2002 she was focused heavily on writing and singing her own songs, collaborating with various producers in the United States such as Guy Sigsworth, Yoad Nevo, and Ge-Ology to help create what would become her debut studio album: "Finally Woken", released on 24 March 2004 through ATO Records.
 Popularised by singles "They", "Just a Ride" and "Wish I", the album garnered generous sales and chart performance in the United States, Canada, Japan and Europe.
 Jem followed up her successful debut with her second album, "Down to Earth", released on 18 September 2008.
 Jem's musical style is varied and encompasses genres of trip hop, electronica, pop rock and new wave, with critics often associating her with other female British musicians Dido, and Beth Orton.
Hey is the second studio album by German recording artist Andreas Bourani.
 Produced by Bourani along with Julius Hartog, Peter "Jem" Seifert, Philipp Steinke and several other musicians, it was released by Vertigo Berlin on May 9, 2014 in German-speaking Europe.
 Boosted by the number one success of its leading single "Auf uns", it reached the top ten of the German Albums Chart.
Jem Alan Cohen (born 1962) is a New York City–based U.S. film-maker, especially known for his observational portraits of urban landscapes, blending of media formats (sixteen-millimetre, Super 8, videotape) and collaborations with musicians.
 He is the recipient of the Independent Spirit Award for feature film-making.
 "Cohen's films have been broadcast in Europe by the BBC and ZDF/ARTE, and in the United States by the Sundance Channel and P.B.S.
 They are in the collections of the Museum of Modern Art, The Whitney, and Melbourne's Screen Gallery."
Glass Pear is a singer and songwriter, born Yestyn Griffiths.
 The Welsh singer is the younger brother of recording artist Jem.
 After co-writing songs for her first album, "Finally Woken", and the follow-up, "Down To Earth", Griffiths sent a 4 track demo to the DJ Nic Harcourt of KCRW.
 Harcourt's early support for the tracks "Last Day Of Your Life" and "Vultures" was instrumental in getting the music heard.
 In late 2008, the producers of "90210" chose "Last Day Of Your Life" to end the first episode of the new series and "Grey's Anatomy" used the track in early 2009.
 Described by Dave Matthews' A&R as being like "Keane but with balls", Griffiths cites Jeff Buckley and The Beatles as influences, while echoes of early Radiohead and Coldplay are heard throughout Glass Pear's stadium-sized sound.
Matt McCoy is a songwriter, worship leader and a Christian musician.
 His first studio album ""Raise the Flag Again"" was released in March 2008 and was produced by Vineyard Music producer, Robbie Reider.
 In 2010, Matt's second studio album "Heaven Calling" was released featuring 13 original songs.
 On December 31, 2012, Matt recorded "Shine (Live)" in downtown Indianapolis with over 3,000 Campus Crusade college students.
 Born and raised in San Diego, California, Matt now resides in Chicago, IL and has since been on staff as a worship leader at Willow Creek Community Church and Harvest Bible Chapel, where he currently serves.
 He is also the founder of LoopCommunity.com (known as Loop Community), an online resource for worship leaders and musicians for worship loops, multi-tracks, and the use of technology in worship.
 In September 2011, he became an Ableton Certified Trainer and travels the country teaching worship leaders and musicians how to use loops and multitracks in live worship and performance.