Beatrice is a lyrical jazz ballad composed by Sam Rivers, first recorded for his 1964 Blue Note debut album Fuchsia Swing Song with Jaki Byard on piano, Ron Carter on bass, and Tony Williams on drums. Rivers wrote the piece as part of his daily composing routine, naming it after his wife Beatrice, with whom he shared a 56-year marriage. She later managed Rivbea Productions and the couple's Studio Rivbea, a vital New York loft space that incubated avant-garde artists including Anthony Braxton during the 1970s. The melody is simple, floating, and deeply felt, supported by a blend of modal and traditional harmonic movement that creates an impression of formlessness while retaining underlying structure. This balance between freedom and convention gives improvisers room to navigate between open expression and grounded chord changes, an approach sometimes likened to windsurfing over shifting waves. The composition opens with a rubato piano introduction before settling into a mid-tempo, propulsive feel well suited to the tenor saxophone. Often compared to John Coltrane's Naima for its origins as a tribute to a musician's partner, Beatrice has become one of the most widely performed post-bop ballads, recognized as a jazz standard rather than a deep cut. Its enduring appeal lies in the emotional directness of its melody and the flexibility it offers to interpreters across generations.