Trenna is of Welsh origin and means "from the hill fort". It's a unique, uncommon name that adds a touch of uniqueness to those who bear it.
"The name Trenna experienced a significant rise in popularity between the mid-1940s and early 1960s, with peak years being 1955 (16 births), 1960 (21 births), and 1965 (32 births). However, it has since become less common, with fewer than 10 births per year from the late 1970s onwards, and often just a handful or even single-digit numbers each year."