Library /sys$common/syshlp/mailhelp.hlb SPAWN, Qualifiers, /PROCESS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PROCESS=subprocess-name

    Specifies the name of the subprocess to be created. The default
    name of the subprocess is USERNAME_n. If the subprocess name
    contains spaces or special characters, or is case-sensitive, then
    the subprocess name must be enclosed in quotation marks.