A title of honour, common with the old poets, as Dan Phoebus,
Dan Cupid, Dan Neptune, Dan Chaucer, etc. (Spanish, don.)
Dan Chaucer, well of English undefiled,
On Fame's eternal beadroll worthy to be filed.
Queene, book iv. canto ii. 32.
From Dan to Beersheba.
From one end of the kingdom to the other; all over the world;
everywhere. The phrase is Scriptural, Dan being the most northern and
Beersheba the most southern city of the Holy Land. We have a similar
expression, “From John o' Groats to the Land's End.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894