Combination of Tea and Sandra, or a modern variant.
Teandra is a modern American invention likely created by blending the prefix 'Te-' with the name Sandra, or as a variation of Deandra. Sandra is a diminutive of Alexandra, meaning 'defender of men,' giving Teandra a secondary link to strength and protection.
Less common today
Teandra isn't in the latest US Top 1000. It last peaked at #5,025 in 1990.
US births per 5-year period, 1990βpresent (SSA data).