Question:
The standard Name field is automatically created after creating a custom object. The default length of the field is 80. Is it possible to increase the length?

Answer:
Currently, it cannot be achieved due to the limitation of Salesforce(SFDC). But a workaround is mentioned here.
Related Documentation:
SFDC Help Documentation:
- Can we have the standard name field size increased on a custom object?
- Increase Name field length from 80 to 255