A fun take on a word "identity". It also is a great mash between "identity" and "idea".
Idendify has eight letters and four syllables. Examples of four popular syllable names include Coca-Cola, StumbleUpon and ESPN.
Idendify.com is a dot com domain. Dot com domains are the most prestigious domain extension in the world, famously used by websites like google.com. Owning a dot com says that you own the word "idendify" online.