Over the past 110 years, 77 535 girls and 827 boys have been named Trinity. The name Trinity ranks 401th in the United States among the most common names for girls. For the first time more than ten times newborns were named Trinity in 1970. The peak of popularity of the name Trinity came in the 2000s and 2010s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.