No, they are not related. Morris Day was his onetime bandmate in Grand Central.
The band Grand Central was formed by Prince ('Prince') Rogers Nelson and André Simon (‘Cymone’) Anderson in 1974, comprising Prince’s cousin Charles Smith (on drums), André (bass), Linda Anderson (André’s sister, keyboards) and Terry Jackson and William Daugherty (percussion). The band was later joined by Daugherty’s cousin, Morris Day, to replace Charles as drummer. The band was renamed Champagne in 1976.
In the news, sadly, singer Prince has died age 57. His body was discovered at his Paisley Park compound in Minnesota early Thursday morning, April 21, 2016.
One day after Prince was pronounced dead, the chief medical examiner for the Midwest Medical Examiner's office performed an autopsy on the music legend to determine the cause of death. Read more at ABC News.