The triad or three-in-one
Trinady is a modern phonetic spelling variant of Trinity. It refers to the Christian doctrine of the Holy Trinity, representing the Father, Son, and Holy Spirit, and is derived from the Latin word 'trinitas'.
Less common today
Trinady isn't in the latest US Top 1000. It last peaked at #5,439 in 2002.
US births per 5-year period, 1990βpresent (SSA data).