I'm not for sure about it, but Judas' father's name was Simon, and they were at a Simon's house.
John 12:4 (KJV)
Then saith one of his disciples, Judas Iscariot, Simon's [son], which should betray him,
Mark 14:3 (KJV)
And being in Bethany in the house of Simon the leper, as he sat at meat...