1) A great wolfhound in Tolkien's book The Silmarillion. Loyal to Caranthir, he followed the elf-lord into exile and the doom of the Noldor fell upon him - although immortal, he could now be slain, and fate said he would be killed by the greatest wolf ever to live. After Caranthir's attempt to abduct Luthien, Huan joins Luthien and allows her to ride him to Tol Sirion, where he slays Draugluin
and helps rescue Beren. He later aids Beren and Luthien several times, but departs before their attempt to enter Angband. When the enraged Carcharoth
descends on Beleriand, Huan joins the party sent against him, and the two meet in combat and slay each other.
Another peculiar part of his curse is that he may speak, but only three times.
2) A doctor in Suikoden II, who is one of the 108 stars and who is already part of Viktor's army and does not need to be recruited.
The first is pronounced "HOO-an", the second presumably is "hwon".