Ele tem apelidos
Dany só se refere a ele como "Viserys" ou "seu irmão" em seus capítulos POV, então é provável que ela nunca tenha um apelido para ele. O que faz sentido, já que no começo da história ela ainda tem medo dele.
Viserys, no entanto, chama a si mesmo de "O Dragão" em várias ocasiões. Embora isso possa ser ele se referindo a ficar com raiva, ele chama isso de si mesmo com frequência suficiente, isso se torna uma espécie de apelido de si mesmo.
"You will not fail me tonight. If you do, it will go hard for you. You don't want to wake the dragon, do you?" His fingers twisted her, the pinch cruelly hard through the rough fabric of her tunic. "Do you?" he repeated.
A Game of Thrones, Daenerys I
Her brother had a simpler name. "Our land," he called it. The words were like a prayer with him. If he said them enough, the gods were sure to hear. "Ours by blood right, taken from us by treachery, but ours still, ours forever. You do not steal from the dragon, oh, no. The dragon remembers."
A Game of Thrones, Daenerys I
As pessoas das ruas ao redor do palácio de Illyrio e Pentos o chamam de "O Rei Mendigo".
Years past they had been forced to sell their last few treasures, and now even the coin they had gotten from Mother's crown had gone. In the alleys and wine sinks of Pentos, they called her brother "the beggar king." Dany did not want to know what they called her.
A Game of Thrones, Daenerys I
Por fim, os Dothraki o chamam de "Khal Rhae Mhar" e "Khal Rhaggat", que significa "o Rei Sorefoot" e "o Rei do Carrinho" respectivamente, embora Viserys não soubesse o significado das palavras que os levam a ser bons coisas.
Dany followed on her silver, escorted by Ser Jorah Mormont and her brother Viserys, mounted once more. After the day in the grass when she had left him to walk back to the khalasar, the Dothraki had laughingly called him Khal Rhae Mhar, the Sorefoot King. Khal Drogo had offered him a place in a cart the next day, and Viserys had accepted. In his stubborn ignorance, he had not even known he was being mocked; the carts were for eunuchs, cripples, women giving birth, the very young and the very old. That won him yet another name: Khal Rhaggat, the Cart King. Her brother had thought it was the khal's way of apologizing for the wrong Dany had done him. She had begged Ser Jorah not to tell him the truth, lest he be shamed. The knight had replied that the king could well do with a bit of shame … yet he had done as she bid. It had taken much pleading, and all the pillow tricks Doreah had taught her, before Dany had been able to make Drogo relent and allow Viserys to rejoin them at the head of the column.
A Game of Thrones, Daenerys IV