Beautiful business name that alludes to the expression "déja vu" (i.e. 'familiarity').
The name "dyja" has only four characters and only two syllables. Two-syllable names are very rare and highly desirable. Established brands using two syllable names include Twitter, Pocket and Sony.
Dyja.com is a dot-com domain. Dot com domains are the most popular, and the most sought after. When most people think of a website, they think of a dot-com.