Hi shangrila_la,
Aleydis is a form of
Adelheid (English form:
Adelaide). When Adelheit got latinized, it became Adalheidis, and the contracted form is Aleidis (variant spelling: Aleydis).
It could have happened the other way round as well: Aleid is a Low
German short form of
Adelheid. The latinized form of Aleid is Aleidis (variant spelling: Aleydis).
The
German pronunciation is: ah-LIE-dis.
/
Satu
http://www.nordicnames.de/