diphthongs in names

[Paulo Barreto <BARRETO%VELAHF@ECCSA.TR.UNISYS.COM>]

I wonder how to lojbanize Portuguese names that have the diphthongs
/eu/ and /ou/, as in "Tadeu" and "Sousa". These would sound more or
less "taDEU" and "SOUza" when lojbanized, but the most similar
spellings I can imagine are "tade'u" and "SO'uza", which are quite
annoying for (brazilian) Portuguese speakers.

In synthesis: As /iV/ and /uV/, and even /yi/ and /yu/ diphthongs
are allowed in names, why are /eu/ and /ou/ forbidden? Or aren't they?

    Paulo S. L. M. Barreto  --  Software Analyst  --  Unisys Brazil
    Standard disclaimer applies ("I do not speak for Unisys", etc.)
                       e'osai ko sarji la lojban.