last time (2009) i went to immig office near doha intl airport to have the name of my brother on the visa amended. just tell them what you need and they will change it as requested. bring all docs with you (i.e. copy of passport, visa)

after 2 days, i checked online and it's done.

If labor office has taken the copy of it, please check the visa online now...maybe it's already amended.

MOI website: www.moi.gov.qa