siblings of Choir Boy xx

half siblings paternal

broodmare Winter Sport xx (Thoroughbred, 1941, from Hyperion xx)

Winter Sport xx

horse Zoysia xx (Thoroughbred, 1945, from Hyperion xx)

Zoysia xx

horse Zaroff xx (Thoroughbred, 1937, from Hyperion xx)

Zaroff xx

horse Zenith xx (Thoroughbred, 1957, from Hyperion xx)

Zenith xx

horse Zollas xx (Thoroughbred, 1938, from Hyperion xx)

Zollas xx

broodmare Iona xx (Thoroughbred, 1943, from Hyperion xx)

Iona xx

horse Jet High xx (Thoroughbred, 1951, from Hyperion xx)

Jet High xx

horse Jewel xx (Thoroughbred, 1951, from Hyperion xx)

Jewel xx

horse Judicate xx (Thoroughbred, 1949, from Hyperion xx)

Judicate xx

horse Kara Tepe xx (Thoroughbred, 1949, from Hyperion xx)

Kara Tepe xx

broodmare La Perie xx (Thoroughbred, 1951, from Hyperion xx)

La Perie xx

broodmare Lady Betty xx (Thoroughbred, 1940, from Hyperion xx)

Lady Betty xx