Re: Iseut/Isolde etymology: Celtic?

From: Joao S. Lopes
Message: 68361
Date: 2012-01-04

Usual Portuguese form was <Iseu>, common during XIV-XVI centuries, now obsolete. The form <Isolda> became usual only after success of Wagner's opera Tristan & Isolda. Trista~o (Tristan in Portuguese) was very popular along XV Century, as attested by many navigators' names.
*

JS Lopes

De: Rick McCallister <gabaroo6958@...>
Para: "cybalist@yahoogroups.com" <cybalist@yahoogroups.com>
Enviadas: Quarta-feira, 4 de Janeiro de 2012 17:59
Assunto: Re: [tied] Iseut/Isolde etymology: Celtic?
 
I believe there are but I don't know if they are cognates or just borrowings. As you know, the Spanish forms are Tristán and Isolda (sometimes Isolde), which are probably the same or similar original Old French forms. 

From: Joao S. Lopes <josimo70@...>
To: "cybalist@yahoogroups.com" <cybalist@yahoogroups.com>
Sent: Wednesday, January 4, 2012 2:24 PM
Subject: Re: [tied] Iseut/Isolde etymology: Celtic?
 
Any Irish or Welsh cognate anthroponym?

JS Lopes

De: Rick McCallister <gabaroo6958@...>
Para: "cybalist@yahoogroups.com" <cybalist@yahoogroups.com>
Enviadas: Terça-feira, 3 de Janeiro de 2012 23:30
Assunto: Re: [tied] Iseut/Isolde etymology: Celtic?
 
Iseult is somewhere in the files Ad-solita (vel.sim) "she who must be looked it", i.e. the same as Miranda
Tristan may be related to Pictish Drosten. I seem to remember reading that it meant "Prince"

From: Joao S. Lopes <josimo70@...>
To: Cybalist <cybalist@yahoogroups.com>
Sent: Tuesday, January 3, 2012 8:19 PM
Subject: [tied] Iseut/Isolde etymology: Celtic?
 
Is there a secure etymology for Iseut/Iseult, Isolde from Tristan & Isolde? Esyllt could derive from ON i:shilDr, but we could relate this name to Latin or Breton origin?

JS Lopes