workplace name; name used at work
Refers to a name used in a professional setting, often a maiden name or a registered alias different from one's legal name. Common in contexts of women continuing to use their maiden name at work after marriage.
Even after marriage, she continues to use her maiden name as her workplace name.
Please fill in your workplace name on this form.
旧姓 specifically means 'former surname' or 'maiden name', while 職場氏名 is the name actually used in the workplace, which may or may not be the maiden name.
通称 is a broader term for a commonly used name or alias, not limited to the workplace.
Compound of 職場 (workplace) and 氏名 (full name). The exact origin is uncertain, but it likely arose in modern corporate contexts to distinguish between legal names and names used professionally.