Ajibola Shogbamimu, age 40 of Fordwych Road, London, has been charged with murder.
Shohfah-El Israel, 40, of Fordwych Road in Cricklewood, north-west London, appeared at Hatfield Remand Court charged with her murder.
Police previously reported his name as Ajibola Shogbamimu, but court staff said he had changed his name by deed poll.
Joy, a midwifery student was last seen in Ilford on December 26, 2018. She was reported missing to police on Thursday, February 7.
As part of the investigation, officers are keen to trace information around a highly distinctive Honda that Joy regularly travels in (pictured). The vehicle’s owner has been identified and spoken to but it is believed that the vehicle is linked to Joy’s disappearance.
Ms Morgan, of Hatfield, Hertfordshire, was last seen at a church called Israel United in Christ in Ilford, London, on 26 December.
She has not used bank cards, withdrawn money from her account, made any mobile phone calls or used social media since she disappeared, police said.
Ms Morgan was last in contact with fellow students via WhatsApp on 27 December.
If you have seen Joy since she was reported missing or have information about where she has been, please call Hertfordshire Constabulary’s non-emergency number 101. If you believe you are with Joy now or have seen her in the last few moments, please call 999 immediately.
Det Ch Sup Karena said: "We need to consider the context in which Joy has gone missing, and given the sudden nature of her disappearance, and the non-contact with her friends, family or fellow worshippers at her church, at this stage we have to consider that she may have come to harm."
Joy is described as black, of slim build, around 5ft 5in tall, with black afro-style hair which she often covers with a scarf. She also wears glasses.
She has links to Ilford, Battersea, Cricklewood, Stevenage and Luton.
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