Would "knoll" satisfy?
Knoll.
Cowbell
Ashe
golf
nation
Knoll.
sharpie
Cowbell
After a capitalized letter, in the beginning of a sentence of after a name. John, Jane, etc
Hi
Ashe
hilllet
golf
ViburnumViolette.
roscoe
amoeba
There hasn't been one with three letters beginning in u and ending in n.