Mikuláš was the son of Mareš z Újezda but his mother is unknown. The date and place of his birth have not been found.
He died about 1435. The place is not known.
His wife was Anna z Nechvalic. They were married, but the date and place have not been found. Their three known children were Mikuláš II (?-1462), Jan I (c1427-1470) and Anna (?-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | ABT 1435 |
|