Abe came up with a name that he thought Sijrhed was, meaning jewels....but I read it as Sigrid myself, having a famous Aussie actress Sigrid Thornton helped or I wouldn't have know the name at all. Look at it - Sijr - (Si - gr) - hed - (id) So I say Sijrhed is Sigrid.
Sigrid [siɡrɪd] is a Scandinavian given name for women from Old Norse Sigríðr, meaning "victory" " wisdom " and "beautiful". Nicknames for Sigrid are Siri, Sigga, Siggan and Sickan. The Latvian version of the name is Zigrīda.
Victory is interesting since it seems to associate her then with Nike and wisdom, well, Athena fits the bill there.
BUT Sigrid means beautiful in Old Norse. A Swedish name.
That is because you read Sijrhed as an English speaking person: the Dutch/Frisian -J- is not pronounced like the English -J-. Here the -J- is pronounced like the -I- in 'liar' or the -Y- in 'yes'.
So, if you pronounce it the right way, it will be like 'say-red', and that's almost similar to 'sieraad' (pronounced 'sea-raht').