Teancum is of Hebrew origin, meaning "God is with us". It is a variant spelling of the name Tannachum, which was borne by a figure in the Book of Mormon, an ancient text sacred to members of The Church of Jesus Christ of Latter-day Saints. In Mormon culture, Teancum has been used as a given name for males, particularly among families who are active members of the church. However, it is not a common name outside of this specific cultural context. It does not have any known variants or diminutives, and its usage has remained relatively rare and consistent over time.
"Over a span of nearly two decades (1996-2020), the name Teancum saw a peak in popularity with 17 births in 2004, while it had its lowest points with only 5 births each in 1996 and 2013. The overall trend shows fluctuations, but no clear steady increase or decrease."