This means /ˈde.bi.ən/ in this case.
Source: https://www.debian.org/intro/about#history
> The project name is pronounced Deb'-ee-en, with a short e in Deb, and emphasis on the first syllable. This word is a contraction of the names of Debra and Ian Murdock, who founded the project. (Dictionaries seem to offer some ambiguity in the pronunciation of Ian (!), but Ian prefers ee'-en.)
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[0]: https://www.debian.org/doc/manuals/debian-faq/basic-defs.en....