I like
Kasia but would you pronounce it as Kah-sha or as Kah-see-ah? If the later, it works with
Tekla but the first sounds sing-songy.
If I could mix and match, I like
Tekla Antonina best.
"You sought a flower and found a fruit. You sought a spring and found a sea. You sought a woman and found a soul. You are disappointed."
"It does not become me to make myself smaller than I am." (
Edith Södergran 1891-1923)