The body of Kanticha Noon, 36, was discovered at a property on the Queen’s Hills estate on Friday, along with that of her sister’s husband, Bartlomiej Kuczynski, and his two daughters, seven-year-old Downreuang and Jasmin, 12.
According to reports, she had arrived in the UK on December 27 to stay with her sister Nanthaka – the girls’ mother – and the family at the house.
Her sister is understood to have been at work at the hospital at the time of the tragedy.
The four bodies were discovered shortly after 7am on Friday, after police responded to a call from a member of the public.
Just over an hour earlier, Mr Kuczynski made a 999 call from the property, but police were not dispatched there.
Norfolk Constabulary has since referred itself to the police watchdog to investigate the handling of the call and also the handling of an earlier incident, on December 14, when Mr Mr Kuczynski was reported missing.
The force has said it is not seeking anyone else in connection with the tragedy.
Ms Noon’s friend Naty Wathanakul told The Mirror she had been due to fly home at some point next month.
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Ms Noon had previously visited the family in June – attending a sports day event at Queen’s Hill primary school, where her younger niece had been a pupil – but had been “hesitant” to return to Norfolk.
Her friend added: “She didn’t want to go to the UK this time for no reason because she went there once or twice a year normally.
“She loved her nieces, I always saw their pictures together.
“She is a single woman, no boyfriend, no husband – that’s why she spent most of her time with those lovely girls.”
Ms Wathanakul added: “Kanticha was very nice and caring to all friends of her, a really big supportive person, she helped everyone.”
A post-mortem examination carried out on Sunday found Ms Noon died of several stab wounds to the neck.
Mr Kuczynski was found to have a single stab wound to his neck.
The bodies of the two girls will be examined on Wednesday.
