Terhi Uusi-Luomalahti is a Finnish former football defender who played for HJK Helsinki, among other teams, in the Naisten Liiga. She was a member of the Finnish national team for thirteen years, taking part in the 2005 European Championship.
If Terhenetär comes from terho (acorn), it means a lady/woman of acorn (-tär is a feminine ending like -ess in actress). But it's more possible that it comes from terhen whitch means mist, and as you add -tär in the end, it means a lady/woman of mist. [noted -ed]