Helernus

[2] His sacred grove (lucus) was near the mouth of the Tiber river.

[3] Sacrifices were made to him annually on 1 February by the Roman Pontiffs, in which a black ox was killed.

[a][1][5] He had one daughter, named Carna, who was goddess of protecting the intestines of children from vampires.

[2] Poultney and others compare Helernus with the similarly (apparently) chthonic deity Hule/Horse/Huřie who shows up a couple times in the Umbrian Iguvine Tablets.

[6] This article relating to an ancient Roman myth or legend is a stub.