Literature Reference: 恒 means long-lasting; 仪 means law or standard. Source from 'Shuowen Jiezi'.
恒: Eternity, unwavering perseverance.
仪:
"Demeanor and appearance, often associated with a name, signify gracefulness and appropriateness, leaving a favorable impression."
Meaning: 恒 signifies perseverance; 仪 symbolizes elegance and propriety.