siblings of Laughter xx

half siblings maternal 2 half siblings paternal 42
  half siblings maternal (2)
  half siblings maternal (2)
  half siblings paternal (42)

half siblings maternal

horse Humorist xx (Thoroughbred, 1918, from Polymelus xx)

Humorist xx
gender-male
1918

Polymelus xx / Sundridge xx

stallion Chief Ruler xx (Thoroughbred, 1920, from The Tetrarch xx)

Chief Ruler xx
gender-male
1920

The Tetrarch xx / Sundridge xx