Fernando was the son of unknown parents. The date and place of his birth have not been found.
His wife was Juana Manrique de Lara, who he married in 1427. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | conde de Castro y Denia 2° | |||||
| Nobility Title | adelantado de Castilla | |||||
| Nobility Title | señor de las villas de Lerma, Cea, Gumiel de Mercado |