The harlequin was a character in Italian theatre.
you just used it in a sentence.
The harlequin toad crouched amidst the tall reeds.
Harlequin Melodies was created in 1968.
Harlequin beetle was created in 1758.
Harlequin Enterprises was created in 1949.
Harlequin Valentine was created in 2001.
Harlequin darter was created in 1887.
Harlequin Games was created in 1994.
Harlequin Air was created in 1997.
Harlequin Air ended in 2005.
Harlequin League was created in 2007.
Requiem for a Harlequin was created in 1970.