Eva Leptich was the mother of Christian Plennert. Christian Plennert's sister-in-law was Mrs. Lorenz Freisinger.

I assume after the death of Eva Leptich her husband, Ignatz Plennert, married Katherina Nozak, mother of the two women who later were Mrs. Lorenz Freisinger and Mrs. Christian Plennert.

There may well be other relationships - those are the ones in MY OWN family tree.