Cardea

In Roman mythology, Cardea was the goddess of health, thresholds and door hinges and handles, also associated with the wind. Her name comes from cardo, meaning door-pivot. She protected children against vampires and witches, and was also the benefactress of craftsmen. Her cult was important in ancient Rome, and was worshipped at the Beltane festival and during June, both of which were seen as a metaphorical "hinge" for the year.  Masks, balls and figurines (oscilla) were hung from doorways or trees to encourage crop growth in reverence to her. The hawthorn tree was sacred to her.
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[Roman] The goddess of thresholds and especially door-pivots (cardo "door-pivot"). Just as Carna she is also a goddess of health. Cardea is the protectress of little children against the attacks of vampire-witches. She obtained the office from Janus in exchange for her personal favors. Ovid says of Cardea, apparently quoting a religious formula: 'Her power is to open what is shut; to shut what is open.'