On creating a lead and converting it to an opportunity, the Person name will not be populated if only the Company name has been selected.
1. Create a Lead
2. Add or find a company for the lead.
3. Select the company
4. Covert the lead to an opportunity
The “Opportunity Person Name” field remains blank, and does not auto-populate with the Person name from the lead.
This behaviour is by design. The Person record must be selected manually, as there may be multiple people associated with a single company.