You are my hero for the day. 
Herb, yes. But I’ve never heard any Yank pronounce that first one “umble”. Maybe it’s an East coast thing…
Jack Prelutsky’s poem Opossum depends on this difference in pronunciation.

Websters reports that it is pronounced \ˈshev-rən\ , are there places where they say “hevron” or “evron”?
Or I’m missing the point?
Missing the point but I do agree that it isn’t the best example as a true silent word like czar.
Ignatz
26
x as in xylophone
L as in yama (llama)