BAYREUTH AND BEIRUT

Okay this is one of those strange things I wonder about and have never heard an explanation for.   The German town Bayreuth has a name that seems convergant with Lebanon's central city, Beirut.   Is this  serendipity?  Western colonialism's vestige?  Or just chance?   I've often wondered and never heard an answer.   And there are other similar incongruous convergances.