There are multiple artists called Incognito:

1) Incognito are a British band, widely regarded as one of the key members of the acid jazz movement. Their first album, Jazz Funk, was released in 1981, with twelve further albums following, the last of which, Tales From The Beach, was released on May 2008.
Throughout the band's history, it has been led and driven by composer, producer, guitarist and singer Jean-Paul "Bluey" Maunick. Other notable band members have included the singers Maysa, Jocelyn Brown and Carleen Anderson.

The band has had intermittent success in the singles charts, with their breakthrough hit a version of the Ronnie Laws tune "Always There", featuring Jocelyn Brown. They have also been a favourite of various re-mixers, including Masters at Work, David Morales, Roger Sanchez and Jazzanova, and have released three albums consisting almost entirely of remixes.
http://www.incognito.org.uk

2) Incognito were originally formed by Light of the World members Jean Paul Maunick and Paul Tubbs Williams when the band formed various splinter groups including Beggar & Co and The Team.
Of those mentioned above, Incognito have been the most successful and enduring.