Er ist verheiratet mit Ilse Christine Bertha Hubertine Servaes.
Sie haben geheiratet am 2. April 1942 in Berlin-Zehlendorf.Quelle 1
Röwekamp (2005, p.363) writes that Ilse Eben-Servaes announced on Aug. 18th, 1942 that her surname had changed to Schmelzeisen-Servaes, I presume to the lawyers' chamber (Rechtsanwaltskammer) in Berlin. The Berlin address book for 1942 still lists her as 'Eben-Servaes', in 1943 it's
'Schmelzeisen-Servaes'. A marriage to some 'Schmelzeisen' is the most likely explanation but none of the three 'Schmelzeisen' men in Berlin is registered under her address so they're unliklely candidates.
It's an interesting idea that G. K. Schmelzeisen may have been Ilse's husband. Both were successful lawmen, Prof. Schmelzeisen had written his Habilitation thesis about the historical legal position of women in the municipial economy and he lived in Halle/Saale since spring 1942 so wouldn't appear in the Berlin address book.
Das Paar ist geschieden.