Re: Same name (was Re: Brithenig-heads)

At 07:55 AM 4/10/2000 -0500, Carlos wrote:
>In Colombia, John (and Jonh and Jhon), Giovanni (occationally Yovani) and
>Iván are common names besides Spanish standard form of Juan.
>
>But my favorite is Jacob (Latin?), which surfaces in Spanish as Jacobo,
>Diego, Santiago and Jaime.  All forms are very common, and pretty old.
I've been wondering for a few years where the various James/Jacob names
came from and how they related to each other, especially in Spanish. I
often see Diego cited as being equivalent to James, with nothing to support
this. Is Diego related to (San)tiago, as it seems to be? (Also the
Portuguese name Tiago) If so, my theory is this:

Latin SANCTE IACOBE "Saint Jacob" (vocative) > Spanish Santi Yagüe* >
Santiago; reanalyzed as San Tiago, thus the name Tiago. Dunno how exactly
Diego could come from that, but it does look close...

* "From Latin to Spanish" (p. 276 I think) lists this simply as a "name"
but does not specify if it's a personal name, a toponym, or what.