Question: Who was born first, Mark Slaughter or London LeGrand?
Context: "Up All Night" is a song by American hard rock band Slaughter.  Written by band members Mark Slaughter and Dana Strum, it was the third title on the band's debut album, "Stick It to Ya", and the band's first single.  It is their second most popular song, according to Last.fm.  It was released in 1990. Let the Truth Be Known is the debut album by hard rock supergroup Souls of We released on May 27, 2008 via the group's official website with the first 1000 copies, with blues musician Robert Johnson inspired album artwork, signed by members London LeGrand and George Lynch.  The album was later released on November 4 of the same year, through Shrapnel Records, under the moniker "George Lynch's Souls of We" with new album artwork, a rearranged track listing as well the additional track "Nork 13".  The album was self-produced in various studios around Los Angeles and mixed by Mudrock, who has work with bands such as Avenged Sevenfold and Godsmack. Brides of Destruction was a short-lived American hard rock supergroup from Los Angeles, California, formed in 2002.  The band's last lineup consisted of singer London LeGrand (vocals), Tracii Guns (lead guitar) and Scot Coogan (drums, percussion).  Previous members of the band were Nikki Sixx (bass), Kris Kohls (drums), Adam Hamilton (keyboard), John Corabi (rhythm guitar), Scott Sorry (bass) and Ginger (rhythm guitar). All Systems Go is the second and final studio album by American glam metal band Vinnie Vincent Invasion, released on May 17, 1988.  "All Systems Go" featured new vocalist Mark Slaughter, who replaced Robert Fleischman.  The band toured in support for the album, headlining small clubs, but broke up after the completion of the tour at the end of August 1988.  The album features Yngwie Malmsteen's vocalist Jeff Scott Soto on backing vocals. Slaughter is an American rock band formed in Las Vegas, Nevada by lead vocalist/rhythm guitarist Mark Slaughter and bassist Dana Strum.  The band reached stardom in 1990 with their first album "Stick It to Ya", which spawned several hit singles including "Up All Night", "Spend My Life", "Mad About You" and "Fly to the Angels".  The album reached double platinum status in the United States.  The band remains a steady act in national tours, mainly in the Rock Never Stops Tour which features several bands of the same era. Dana Strum (born Dana Strumwasser on December 13, 1958 in Washington, DC) is the bassist of glam metal band Slaughter.  Before that, he was in Vinnie Vincent Invasion together with future Slaughter bandmate, Mark Slaughter.  He was raised in Southern California's San Fernando Valley and began his performing career in the band Badaxe, playing regularly at the infamous Starwood along with Quiet Riot, Mötley Crüe, and others. Edward "London" LeGrand born 30 July 1966.  Is an American musician, lyricist, and vocalist best known for his time with hard rock supergroup Brides of Destruction with Nikki Sixx of Mötley Crüe and Tracii Guns of L.A. Guns.  After the group went on hiatus he formed another band with George Lynch of Dokken and Lynch Mob fame called Souls of We releasing their debut album "Let the Truth Be Known" in 2008.  He also has a side-project named Rockstars on Mars whose demos can be heard on the band's Myspace page. The Abel Axe is an electric guitar invented by Jeff Abel from Wyoming, United States and engineered by James Jones.  Made from aircraft grade T-6 Billet aluminum, its distinguishing features are the various sized holes dotting the body.  All Abel Axes are made in the United States.  Abel Axe has won the Emerging Manufacturer Award in the 1999 Annual Manufacturing Awards Ceremony.  Mark Slaughter, leader of the band Slaughter, owned an Abel Axe. Souls of We (also known as George Lynch's Souls of We) is an American hard rock supergroup from Los Angeles, California, formed in 2007.  The lineup consists of London LeGrand (vocals), George Lynch (guitar) and Johny Chow (bass).  Since 2009, Jordan Mancino has been the band's drummer, replacing Yael. Mark Allen Slaughter (born July 4, 1964) is an American singer and musician.  He is one of the founders of the hard rock band Slaughter, and he has also worked as a voice actor and composer.
Answer: Mark Allen Slaughter