Roots of The O'Jays

Womack & Womack was the singing and songwriting partnership of married American musicians Linda Womack and Cecil Womack. The duo were successful as songwriters for other artists and had several international hits as a singing duo in the 1980s and 1990s. Later recordings with other members of their family were credited to The House of Zekkariyas.

The Intruders were an American soul music vocal group most popular in the 1960s and 1970s. As one of the first groups to have hit songs under the direction of Kenny Gamble and Leon Huff, they were a major influence on the development of Philadelphia soul.

Gerald Edward Levert was an American singer-songwriter and producer. The son of singer Eddie Levert, he formed the R&B vocal group LeVert alongside his brother, Sean Levert, and friend Marc Gordon. He was also a member of the supergroup LSG, along with Keith Sweat and Johnny Gill. Levert is often credited with the discovery of R&B groups The Rude Boys, Men at Large, and 1 of the Girls. He released nine solo albums, and posthumously won a Grammy Award. In 2013, he was a part of the inaugural National Rhythm & Blues Hall of Fame inductees.

Kenneth M. "Keni" Burke is an American singer, songwriter, record producer, and multi-instrumentalist.

Kenneth Gamble and Leon A. Huff are an American songwriting and production duo credited for developing the Philadelphia soul music genre of the 1970s. In addition to forming their own label, Philadelphia International Records, Gamble and Huff have written and produced 175 gold and platinum records, earning them an induction into the Rock and Roll Hall of Fame in the non-performer category in March 2008.

The Five Stairsteps, known as "The First Family of Soul" and later "The Invisible Man's Band", were an American Chicago soul group made up of five of Betty and Clarence Burke Sr.'s six children: Alohe Jean, Clarence Jr., James, Dennis, and Kenneth "Keni", and briefly, Cubie. They are best known for the 1970 song "O-o-h Child", listed at number 402 on Rolling Stone's 500 Greatest Songs of All Time.