"Cup of joe"

[snopes]

Comment: Where does the term "cup of Joe" (coffee) come from?

I think the strongest explanation i've heard is:

"Josephus Daniels (18 May 1862-15 January 1948) was appointed Secretary of
the Navy by President Woodrow Wilson in 1913. Among his reforms of the
Navy were inaugurating the practice of making 100 Sailors from the Fleet
eligible for entrance into the Naval Academy, the introduction of women
into the service, and the abolishment of the officers' wine mess. From
that time on, the strongest drink aboard Navy ships could only be coffee
and over the years, a cup of coffee became known as 'a cup of Joe'."