From Japanese 紗 (sa) meaning "gauze, thin silk", 笑 (e) meaning "to laugh; laughter" combined with 奈 (na) meaning "apple tree". Other kanji combinations are possible.
Sae(새, seh) means "bird" and "new" in Korean. Also combination of 璽(sae) means "royal seal" with 奈(柰, na) meaning "apple tree" make a name, Saena. Other hanja combinations can make the name.