Well, we wanted a German name. The wife and I both really liked and listened to a band named Rainer Maria when we met 9 years ago . Rainer Maria (the band) got their name from the German Poet Rainer Maria Rilke.
Seemed like a good fit
That's cute! We picked Rainer because my brother insisted that he must have a German name since he is German and that is the only German name I could really live with lol It suits him though. Did you know that the name means "deciding warrior" ?