What is the definition of Hildegarde's?

'Hildegarde's' is a rather peculiar surname that's basically a fancy way of saying 'belonging to Hildegarde,' but it's not exactly a name you'd find in a typical genealogical book. It's more like the name of a gothic princess with an edge to her - think 'Hildegard of Bingen' meets 'Princess Darkness.'

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Here's an edgy sentence for you: "I caught a glimpse of 'Hildegarde's' whispering in the shadows, promising to reveal secrets that even the moon wouldn't dare to peep."