Re: Female middle name wanted: J…consonant, bisyllabic, Christian/German, independent
These are the only middle names that I can think of that match your criteria:
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Katharina Jael [ya-EL], but no accent on the first syllable
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Katharine Janice [ya-niece], but no Biblic nor Germanic background and no accent on the first syllable
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Katharina Jasmin [yahs-MEEN], but no Biblic nor Germanic background and no accent on the first syllable
I like
Katharina Jasmin the most, because
Jasmin is very popular both in Germany and English speaking countries (possibly spelled differently, but anyways).