Perseus Evans theory

[kronaeb]

No: HPFGUIDX 88196

I've been enjoying the Snape-y speculations lately but has anyone 
taken out the old "Perseus Evans" theory for examination since OoP?
(In brief- Severus Snape anagrams into Perseus Evans. Remember 
Perseus from mythology? He killed the Medusa with 'snakes' for hair 
and fell in love with Andromeda.)

I remembered it again while reading OoP when Sirius came up with a 
cousin called 'Andromeda'. Of course there's the Lily Evans and Mark 
Evans possible connection as well. This could just be a major JKR red 
herring but does anyone else have thoughts on this perhaps turning 
into part of a future plot?
~Kronae