RYE-ner Maria RIL-kuh
Rainer Maria Rilke's birth name is Rilke, Karl Wilhelm Johann Josef Maria.
Maria Rainer who later becomes Maria von Trapp.
See the blog post I linked below for an explanation of how to pronounce her name.
Rainer Meifert's birth name is Rainer Meiffert.
Rainer Barzel's birth name is Rainer Candidus Barzel.
Rainer Gombos's birth name is Rainer Peter Gombos.
Rainer Hauer's birth name is Rainer Hermann Hauer.
Rainer Bertram's birth name is Rainer Hans Clemens Schink.
Rainer Kaunisto's birth name is Rainer Aaro Uolevi Kaunisto.
the same way its spelled
Jeanne Rainer's birth name is Jeanne Allyn Rejaunier.
Kaj Rainer's birth name is Kaj Rainar Hendunen.