My ROV has yet to gain a name; but since I am still lacking a hull/pressure vessel I think my lack of a name is not an issue yet, however when it becomes more pressing, I can come up with one.

According to Wikipedia the ROVs Naming conventions is as follows

ROVs that are manufactured following a standardized design are commonly named by a brand name followed by a number indicating the order of manufacture. Examples would be Sealion 1 or Scorpio 17. The design of a series of ROVs may have changed significantly over the life of an ROV series, however an ROV pilot will often be familiar with the idiosyncrasies of a particular vehicle by name. ROVs that are one-off or unique designs may be given a unique name similar to the style used for ships. ROVs are not normally referred to in the female gender as ships may be, but by gender-neutral pronouns or ‘neuter words’.

BlogPosts and Build Log

Since the above I have found OpenROV.