No, the name on the online form MUST match the name on her passport EXACTLY... and her visa can ONLY be issued in the exact name on her passport.
If she thinks she will want to change the name in her passport in the next year or so, she should do it BEFORE she applies for this visa, because it’s a big hassle to change it after the FLR(M) has been granted.
This is because her passport name and the name on her visa must match at all times. If she changes her name on her passport she MUST also change it on her visa within 3 months, or she can be fined £1000 and potentially have her visa curtailed. However, to change her name on the visa, it costs £150-200 and can take up to 6 months to be processed, and she would be without her passport and visa for all of that time.
So, she should either change her name on her passport now, and apply for the visa in the new name, or wait until just before she applies for her next FLR(M) in 2.5 years or ILR in 5 years and change it then, so that then next visa will be issued in the new name.
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