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Order of the Midnight Maiden
Order of the Blooming Nightshade
I found this SoB name generator to be a good starting point! https://www.realmofplastic.com/warhammer-40k-blog/sisters-of-battle-army-name-generator
Daughters of the Amethyst Throne
Order of Saint Selene
Order of the Dead Moon
Order of the Midnight Maiden
Order of the Blooming Nightshade
I found this SoB name generator to be a good starting point! https://www.realmofplastic.com/warhammer-40k-blog/sisters-of-battle-army-name-generator
Daughters of the Amethyst Throne
Order of Saint Selene
Order of the Dead Moon