Iobates was a king of Lycia whose daughter Stheneboea (or Antia) married Proëtus. If we pursue the 'moon' sense of Io, then we might have 'moon-goer' for his name, from Io and baino, 'to go'. This could be understood as 'he who travels with the moon', 'voyager'.

However, most of the travelling in Iobates' experience was done not by himself but by Bellerophon, whom he persistently despatched in different directions in an attempt to get him killed (always unsuccessfully, since Bellerophon was aided each time by Pegasus).