Cleopha is undoubtedly a feminine version of the Biblical male name Cleophas.
Othmar (in modern times usually spelled Otmar) is a German name. According to Knaurs Vornamebuch, it goes back to Old High German words meaning "possessions" and "famous", and was in regular use in Germany because of an 8th-century A.D. abbot of St. Gallen.
I would think Jogli is probably a Swiss or southern German pet form of Jacob (Jakob), since Joggi is listed as a pet form of Jakob in the Knaurs book and I know that -li was a common ending for Swiss pet forms.
Sevela is probably a misprint or alteration of Severa, a female form of Severus which according to the Knaurs book was the name of a sainted abbess of a nunnery near Trier.