Bethlehem

permanent; constant; fixed; usual; ordinary; rule (old); one of the 64 hexagrams of the Book of Changes (䷟)

surname Heng

Liu Heng, personal name of Han emperor Han Wendi 漢文帝|汉文帝; Liu Heng (1954-), Chinese writer

conservation (e.g. of energy, momentum or heat in physics); to remain constant (of a number)