Alexander Strakosch, Prof. - Mothers of children Michael, Hermann and Josefina?

Three of the children of Prof. Alexander Strakosch, namely Michael Strakosch, Hermann Strakosch, and Josefina Strakosch have no birth year so it's not clear whether their mother is really Anna as was set there or in the case of Josefine there were actually two mothers (or two Josefinas by different mothers before the merge). Since there were no sources attached I assumed that it was likely based on conjecture and so I removed the links to the mothers in question.

Please share if you have any birth years or sources on these individuals which might point to their mothers.

Interestingly, Alexander had two children with Ortrud, a boy and a girl according to https://www.parlament.gv.at/WWER/PARL/J1848/Buzek.shtml ("2 K (mind. 1 Sohn) aus I. Ehe der Frau") and also a book I am currently reading. Maybe one or two of these profiles could belong to the children Alexander had with Ortrud?

Pinging William Jeggles, Sándor Feldmájer, Paul Haraszti-"Halbauer", and Randy Schoenberg since they are managers of these profiles in question.