Aliasing sirneenya → neenya
Link to alias

Reason:

Same artist. https://e621.net/artist/show?name=neenya
includes http://sirneenya.tumblr.com/

https://www.furaffinity.net/user/neenya/
includes "my Tumblr where I upload sketches http://sirneenya.tumblr.com/ "

SirNeenya Tumblr (hidden in Tumblr dashboard) includes:
"I think I’ll stop posting my own stuff on Tumblr. From now on, follow my Furaffinity (Neenya) or Inkbunny (Neenya) for new art." (artist's 7th newest tumblr post)

While sirneenya is a general tag, all 14 of the posts tagged with sirneenya are also tagged with neenya.
(and all 14 have sirneenya Tumblr as a source URL)

EDIT: The tag alias sirneenya -> neenya (forum #281600) has been approved by @bitWolfy.

The tag alias sirneenya -> neenya (forum #281600) has been approved by @bitWolfy.