Theodoar

In the entry for Teodoar on page 1451 of "Altdeutsches Namenbuch", Förstemann states that the name is unisex [noted -ed]. He does this by putting 'msc. U. fem.' right after the name, which is short for "masculin und feminin" in somewhat old-fashioned German:

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https://archive.org/details/altdeutschesnam00seelgoog/page/n739/mode/2up (in German)

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The trait of being unisex continues with the name's Frisian descendant Dieuwer, which is already in the main database but currently listed as strictly masculine. Here is some information about that, along with examples of female bearers:

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• https://nvb.meertens.knaw.nl/naam/is/Dieuwer (in Dutch; shows the prevalence of the name in the Netherlands in 2017)
• http://www.names.be/voornamen.html?met=Dieuwer&sort=beldesc (in Dutch; shows the prevalence of the name in Belgium in 2009)
• see the entries for Dieuwer and Dieuwertsje on page 63 of "Friesche Naamlijst (Onomasticon Frisicum)" written by Johan Winkler (in 1898): http://images.tresoar.nl/wumkes/pdf/WinklerJ_FriescheNaamlijst.pdf (in somewhat archaic Dutch) and http://www.wumkes.nl/index.php?volg=8&id=95 (in Dutch; click on the red-coloured word "document" in order to download the PDF-file)
• (general): https://www.linkedin.com/pub/dir/?first=Dieuwer&last=&search=Zoeken
• Dieuwer "Dieuwertje" Blok (female, born 1957): https://nl.wikipedia.org/wiki/Dieuwertje_Blok (in Dutch)
• Dieuwer Jacobs (1584-1641), daughter of Pieter Bicker (1522-1585): https://nl.wikipedia.org/wiki/Bicker_(geslacht)#Meer_of_minder_bekende_Bickers_tot_1800 (in Dutch)
• Dieuwer Simonsdochter van Eversdyck, mother of Symon van der Does (1507-1587): https://nl.wikipedia.org/wiki/Symon_van_der_Does#Afkomst_en_jeugd (in Dutch)
• obituary of Dieuwer Jonker-Pieterman (female, died in 2009): https://mensenlinq.nl/overlijdensberichten/dieuwer-jonker-pieterman-1618162/ (in Dutch)
• obituary of Dieuwer "Oeke" Wiersma-Tjalma (female, 1910-2007): https://mensenlinq.nl/overlijdensberichten/dieuwer-oeke-wiersma-tjalma-715845/ (in Frisian)