Ierax (Greek: ΒΠ Ιέραξ, "Hawk") served in the Hellenic Royal Navy from 1912–1946. The ship, along with her three sister ships of Wild Beast-class destroyers Greek destroyer Aetos, Panthir and Leon, was ordered from England. They were purchased in 1912, ready for delivery, each for the sum of £148,000 from the English shipyards Cammell Laird in Birkenhead, when the Balkan Wars seemed likely. These ships had originally been ordered by Argentina; Ierax was originally named Santa Fé. Ierax was accepted by Captain Ath. Miaoulis, RHN in Palermo, Sicily. where she arrived manned by foreign crew.