Sub-clan BI — matriarchal anchor: Marie Mahler née Porges (d. Prague Tuesday 18 February 1930, "in silence, as she lived").

Funeral Thursday 20 February 1930. (Day-of-week check: 18 February 1930 = Tuesday ✓; 20 February 1930 = Thursday ✓.) The faire-part is unusually minimalist, signed only by "the mourning bereaved" without naming individual relatives — a discretion-style notice atypical of the corpus.

Mahler surname — possible Gustav Mahler family connection

The "Mahler" in-law surname raises an open cross-corpus question: could Marie Mahler née Porges be related to the famous composer Gustav Mahler (1860-1911)?

Gustav Mahler was born in Kalischt (Kaliště), Bohemia, and grew up in Iglau (Jihlava), Moravia. His father was Bernhard Mahler (1827-1889), a Bohemian-Jewish merchant in Iglau; his mother Marie Mahler née Hermann (1837-1889). The Mahler surname is moderately common Bohemian-Jewish (derived from "Maler" = painter), so coincidental occurrence is possible.

Reservation: Without further documentation, Marie Mahler née Porges is most plausibly a separate Bohemian-Jewish Mahler family branch distinct from Gustav Mahler's specific Iglau / Kalischt family. However, the namesake identity with Gustav Mahler's mother (Marie Mahler née Hermann) is striking, and a possible distant family connection cannot be ruled out. Bohemian-Moravian IKG records ca. 1850-1930 would be the priority research source.

Even if not directly related to Gustav Mahler, Sub-clan BI adds a new "Mahler" in-law family to the documented Porges affinity network.

Family

The minimalist 1930 faire-part does not list individual relatives. Cross-corpus research priorities:

• Locate the Prager Tagblatt issue of 19-20 February 1930 for any longer or follow-up notice of Marie Mahler née Porges
• Search Prague Israelitische Kultusgemeinde records 1925-1930 for Mahler-Porges marriage records and household registrations
• Search Bohemian Mahler genealogies (especially Iglau and Kaliště) for any Porges-Mahler intersection

Holocaust trajectory

The Mahler-Porges descendants would have been the prime Holocaust deportation cohort. Without named children in the obituary, all "Mahler" Bohemian-resident deportees of the 1942-1944 transports are potential research targets. The Iglau (Jihlava) Mahler families were heavily affected by Nazi persecution after March 1939.

Source: obituaries published in Prager Tagblatt (Prague, 1878–1938) and Neue Freie Presse (Vienna, 1864–1939).