Following the destruction of the ring, when the hobbits are preparing to return home we learn that Merry is known as "Holdwine" to the Rohirrim:
Éomer and Éowyn came to Merry and they said "Farewell now, Meriadoc of the Shire and Holdwine of the Mark! Ride to good fortune, and ride back soon to our welcome!"
Later in the Tale of Years, we see that in 1484
a message came from Rohan to Buckland that king Éomer wished to see Master Holdwine once again
I had assumed that "Holdwine" was just a term of affection for Merry, based on the hobbits' legendary ability to drink and eat. The Tolkien Gateway though, gives the etymological derivation
The word is Old English but its meaning is never given explicitly; and there are several possible interpretations, of which one is 'faithful friend' (from hold, 'faithful, loyal' and wine, 'friend').
Did Tolkien ever make a statement over what "Holdwine" was intended to signify? Am I being too simplistic in thinking it means someone who "can hold their wine", or is the Tolkien Gateway overcomplicating it?
From some responses, it seems there is a third possibility I had not considered, namely that Merry literally "held wine" as a cup-bearer to the king of Rohan. All the possibilities seem plausible, so is there any explicit statement from Tolkien as to what he intended the name to mean?