siblings of Arethissa xx

full siblings 2 half siblings maternal 1 half siblings paternal 5
  half siblings maternal (1)
  full siblings (2)
  half siblings maternal (1)
  half siblings paternal (5)

half siblings maternal

stallion Granicus xx (Thoroughbred, 1807, from Sorcerer xx)

Granicus xx
gender-male
1807

Sorcerer xx / Alexander xx