HAil Sister Zephyr!
I have not found anything else of a mention for you, but will add the following post in addition to others of the thread, and because it mentions the Valkyire name you are looking for:
List of valkyrie names in Norse mythology
"Walkyrien" (1905) by Emil DoeplerIn Norse mythology, a valkyrie is one of a host of female figures who choose which warriors will win or die in battle. The valkyries bring their chosen who have died bravely in battle to the afterlife hall of the slain, Valhalla, ruled over by the god Odin, where the deceased warriors become einherjar. There, when the einherjar are not preparing for the events of Ragnarök, the valkyries bear them mead. Valkyries also appear as lovers of heroes and other mortals, where they are sometimes described as the daughters of royalty, sometimes accompanied by ravens, and sometimes connected to swans.
The Old Norse poems Völuspá, Grímnismál, Darraðarljóð, and the Nafnaþulur section of the Prose Edda book Skáldskaparmál provide lists of valkyrie names. Other valkyrie names appear solely outside these lists, such as Sigrún (who is attested in the poems Helgakviða Hundingsbana I and Helgakviða Hundingsbana II). Valkyrie names commonly emphasize associations with battle and, in many cases, on the spear—a weapon heavily associated with the god Odin. Scholars such as Hilda Ellis Davidson and Rudolf Simek propose that the names of the valkyries themselves contain no individuality, but are rather descriptive of the traits and nature of war-goddesses, and are possibly the descriptive creations of skalds, a type of traditional Scandinavian poet.
Some valkyrie names may be descriptive of the roles and abilities of the valkyries. The valkyrie name Herja may point to an etymological connection to Hariasa, a Germanic goddess attested on a stone from 187 CE. The name Herfjötur has been theorized as pointing to the ability of the valkyries to place fetters. The name Svipul may be descriptive of the influence the valkyries have over wyrd or ørlog—a Germanic concept of fate.
Valkyrie names (Note the Name, meaning and where it is found in the lore are listed)
Brynhildr "Bright battle" Skáldskaparmál
Eir "Peace, clemency" or "help, mercy" Nafnaþulur
Geirahöð Connected to the Old Norse words geirr ("spear") and höð ("battle"). Grímnismál Appears in some manuscripts of Grímnismál in place of the valkyrie name Geirölul
Geiravör "Spear-vör" Nafnaþulur
Geirdriful "Spear-flinger" Nafnaþulur
Geirönul, Geirrönul, Geirömul, Geirölul (various spellings) Uncertain; possibly connected to the Odinic name Geirölnir and the dwarven name Ölnir. Possibly meaning "the one charging forth with the spear". The form Geirölul may be connected to the runic charm word alu. Grímnismál, Nafnaþulur
Geirskögul "Spear-skögul" (see Skögul entry below) Hákonarmál, Völuspá, Nafnaþulur
Göll "Tumult" or "noise, battle" Grímnismál, Nafnaþulur
Göndul "Wand-wielder" Völuspá, Nafnaþulur
Guðr or Gunnr "War" or "battle" Völuspá, Darraðarljóð, Gylfaginning, Nafnaþulur
Herfjötur "Host-fetter" or "fetter of the army" Grímnismál, Nafnaþulur
Herja Related to the Old Norse herja and Old High German herjón (meaning "devastate") Nafnaþulur
Hlaðguðr svanhvít "Hlaðguðr swan-white" Völundarkviða
Hildr "Battle" Völuspá, Grímnismál, Darraðarljóð, Nafnaþulur
Hjalmþrimul Possibly "Helmet clatterer" or "female warrior" Nafnaþulur
Hervör alvitr Alvitr possibly means "all-wise" or "strange creature" Völundarkviða
Hjörþrimul "The sword warrioress," derived from Old Norse hjörr ("sword") and þrima ("battle, noise") Darraðarljóð, Nafnaþulur
Hlökk "Noise, battle" Grímnismál, Nafnaþulur
Hrist Related to Old Norse hrista (meaning "shake, quake") and therefore meaning "the quaking one" Grímnismál, Nafnaþulur
Hrund "Pricker" Nafnaþulur
Kára Either "the wild, stormy one" (based on Old Norse afkárr, meaning "wild") or "curl" or "the curly one" Helgakviða Hundingsbana II
Mist "Cloud" or "Mist" Grímnismál, Nafnaþulur
Ölrún Possibly "ale-rune" Völundarkviða
Randgríðr, Randgrid "Shield-truce" or possibly "shield-destroyer" Grímnismál, Nafnaþulur
Ráðgríðr "Council-truce" or possibly "the bossy" Grímnismál, Nafnaþulur
Reginleif "Power-trace" or "daughter of the gods" Grímnismál, Nafnaþulur
Róta Possibly connected to the Old Norse noun róta (meaning "sleet and storm") Gylfaginning
Sanngriðr "Very violent, very cruel" Darraðarljóð
Sigrdrífa "Victory-urger" or "inciter to victory" Sigrdrífumál
Sigrún "Victory rune" Helgakviða Hundingsbana I, Helgakviða Hundingsbana II
Skalmöld "Sword-time" Nafnaþulur
Skeggöld or Skeggjöld "Axe-age" Grímnismál, Nafnaþulur
Skögul "Shaker" or possibly "high-towering" Hákonarmál, Völuspá, Grímnismál, Nafnaþulur
Skuld Possibly "debt" or "future" Völuspá, Gylfaginning, Nafnaþulur
Sveið Unclear; possibly "vibration" or "noise" Nafnaþulur
Svipul "Changeable" Darraðarljóð, Nafnaþulur
Þögn "Silence" Nafnaþulur
Þrima "Fight" Nafnaþulur
Þrúðr "Strength" or "power" Grímnismál, Nafnaþulur
Form the above, it appears as if Sanngriðr "Very violent, very cruel" is only found in the Darraðarljóð. It may well be just another name of another Valkyrie. OR just one of many who has found our way into the lore and was immortalized in it.
Darraðarljóð is a skaldic poem in Old Norse found in chapter 157 of Njáls saga. The song consists of 11 stanzas, and within it twelve valkyries weave and choose who is to be slain at the Battle of Clontarf (fought outside Dublin in 1014 CE). Of the twelve valkyries weaving, six of their names are given: Hildr, Hjörþrimul, Sanngriðr, Svipul, Guðr, and Göndul. Stanza 9 of the song reads:
Now awful it is to be without,
as blood-red rack races overhead;
is the welkin gory with warriors' blood
as we valkyries war-songs chanted.
At the end of the poem, the valkyries sing "start we swiftly with steeds unsaddled—hence to battle with brandished swords!" The poem may have influenced the concept of the Three Witches in Shakespeare's Macbeth.
Again. Maybe the name: Sanngriðr, is juat but one of many names she may have.
As to Valkyrie names, For my money the Valkyrie: Svipul meaning "Changeable"
found in the Darraðarljóð, Nafnaþulur Seems alot like my wife.
I'm Just saying though....
Sometimes she also seems like: Ráðgríðr "Council-truce" or possibly "the bossy"
as found in the Grímnismál, Nafnaþulur. But afterwrds I think she cahnges into: Þögn "Silence"
as in the Nafnaþulur
She would tell you I am as moody as Odin and tempermental as Thor. In fact, A number of the Name sof Odin she would say fit me. Especially the Grim One.
No disrespect to the beloved Valkyries or my beloved wife... but I couldn't resist a little ribbing. I also can take it as well...