Intertwiner in german? What is the best way to translate the mathematical term ''intertwiner'' (between two representations of a group) into German?

The link What is the german translation for intertwiner? provided by Nick Kidman was quite useful. I found two old German papers by authorities in group theory:

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*R. Brauer, Eine Bedingung für vollständige Reduzibilität von Darstellungen gewöhnlicher und infinitesimaler Gruppen, Mathematische Zeitschrift 41 (1936), 330–339 Link

*O. Tamaschke, Ringtheoretische Behandlung einfach transitiver Permutationsgruppen. Mathematische Zeitschrift 73 (1960), 393-408.
who use on p.406 "verkettet" for the relationship, which suggests the name Verketter, which can indeed be found in recent lecture notes by

*K.-H. Rehren, Konforme Quantenfeldtheorie,
although Rehren subsequently uses the word Intertwiner as a German Lehnswort for this concept.

Edit:
p.273 of arXiv:hep-th/9805093v1 explicitly says 'intertwiners (“Verketter” in the sense of Schur)', and Schur was probably the first one to use the concept at all. Indeed, in his paper "Beiträge zur Theorie der Gruppen linearer homogener Substitutionen", Trans. Amer. Math. Soc. 10 (1909), 159–175, Schur uses in this context the adjective "verkettet", but not the substantive.
Edit2: Hermann Boerner uses in Chapter 3 of his book
Darstellungstheorie der Endlichen Gruppen, Vieweg, Wiesbaden 1967, the term 'Verkettungsmatrix'.
