Destiel
Destiel is the ship name for Dean and Castiel from Supernatural. It is a portmanteau: built by joining a piece of one name to a piece of the other.
Engine version 1.0 · Breakdown computed from the live checker · Research Desk
Structure
de from Dean, plus stiel from Castiel.
Dean coverage 50%
Castiel coverage 71%
At the join, es, a vowel meets a consonant, which is the seam that most often survives being read aloud by someone seeing it for the first time.
Why this name is shaped the way it is
Dean survives as a sound rather than as a spelling, since the blend keeps D and e but not the n. The fandom adopted it anyway, which is community agreement beating structure.
What our own engine would have built
Handed Dean and Castiel with no knowledge of the fandom, the blender proposes Deastiel, Deatiel, Deaiel, Castien, Casn, Castn. Destiel is not among them. That is the normal result, and it is the clearest illustration of why this site refuses to call any candidate the best one. A community picked Destiel for reasons no software can see.
If you want to run the same check on a name of your own, the draft checker does exactly what produced the breakdown above, and the ship name generator builds candidates from two names you supply.
Other portmanteaus
Questions
What does Destiel mean?
Destiel is the ship name for Dean and Castiel from Supernatural. A ship name is a nickname for a pairing, and shipping means wanting two characters to be together.
Who is Destiel?
Destiel is not a person. It refers to Dean and Castiel as a pairing, which is how fandom communities talk about two characters together in one word.
How was Destiel formed?
By joining de from Dean to stiel from Castiel. That keeps 50% of the first name and 71% of the second.