Bayside Boy is out of Alava (Anabaa), winner of the Listed Prix Occitanie. She is also the dam of Forest Ranger (Lawman), a four-time pattern winner who took the Gr.2 Huxley Stakes twice, and the Listed-placed Home Cummins (Rip Van Winkle). Alava is a half-sister to Almaguer (Spectrum), a 25-time winner who was Listed-placed, and to the four-time winner Abril (Anabaa), dam of Abrantes, a six-time winner placed at Group 3 level.

Second dam Cerita (Wolfhound) was a winner and placed three times at Listed level.

Third dam Tanapa (Luthier) won at two and had eleven winners from as many runners. Among them are the Group 3 winner Quirinetta (Ardross), the Listed winner Tarzan Cry (Anabaa), placed at Group 3 level, and Luthier's Launch (Relaunch), a Listed winner who was twice placed at Grade 1 level and second in the Grade 2 La Canada Stakes and the Grade 2 El Encino Stakes. Another daughter, Tamise (Time For a Change), won the Gr.3 Prix de Flore, produced the Group 3 winner Motivado and is the second dam of Sestilio Jet (French Fifteen), winner of the Gr.3 Prix de Saint-Georges.

The family also includes Passing Shot (A.P. Indy), winner of the Grade 1 Personal Ensign Handicap.

Alava's two-year-old colt Lord Of Biscay (Lope De Vega) won on debut, and she also has a yearling filly by Waldgeist and a 2022 filly.