# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/john-i-of-portugal
# Generated: 2026-08-31T22:50:58.039Z

schema: https://schema.org/Person
url: "https://fame.am/person/john-i-of-portugal"
name: "John I of Portugal"
slug: "john-i-of-portugal"
description: "He won a throne in battle against Castile, then held it for 48 years — longer than any Portuguese king before or since. That reign launched an empire."
tagline: "King of Portugal from 1385 to 1433"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Anoniem_-_Koning_Johan_I_van_Portugal_(1450-1500)_-_Lissabon_Museu_Nacional_de_Arte_Antiga_19-10-2010_16-12-61.jpg"
gender: "male"
country:
  name: "Portugal"
  isoCode: "PT"
category:
  name: "Politicians"
  slug: "politicians"
profileType:
  name: "Politician"
  slug: "politician"
birthDate: "1357-04-11"
deathDate: "1433-08-14"
livingStatus: "DECEASED"
scores:
  popularity:           56.21
  momentum:             0.5279164961153147
  historical:           22.838044
  currentAttention:     2.492677759082695
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  169
  category: null
tags:
  - name: "Politicians"
    slug: "politicians"
  - name: "Politician"
    slug: "politician"
  - name: "Politics"
    slug: "politics"
  - name: "Medieval Era"
    slug: "medieval-era"
sources:
  - url: "https://en.wikipedia.org/wiki/John_I_of_Portugal"
    title: "Wikipedia"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q201575"
    title: "Wikidata"
    type:  "WIKIDATA"
  - url: "https://pantheon.world/profile/person/John%20I%20of%20Portugal"
    title: "Pantheon 2.0"
    type:  "DATABASE"
  - url: "https://ar.wikipedia.org/wiki/%D8%AC%D9%88%D8%A7%D9%88_%D8%A7%D9%84%D8%A3%D9%88%D9%84_(%D9%85%D9%84%D9%83_%D8%A7%D9%84%D8%A8%D8%B1%D8%AA%D8%BA%D8%A7%D9%84)"
    title: "جواو الأول (ملك البرتغال)"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D8%AC%D9%88%D8%A7%D9%88_%D8%A7%D9%84%D8%A7%D9%88%D9%84_%D9%85%D9%84%D9%83_%D8%A7%D9%84%D9%BE%D9%88%D8%B1%D8%AA%D9%88%D8%AC%D8%A7%D9%84"
    title: "جواو الاول ملك الپورتوجال"
    type:  "WIKIPEDIA"
  - url: "https://az.wikipedia.org/wiki/I_Juan"
    title: "I Juan"
    type:  "WIKIPEDIA"
  - url: "https://be.wikipedia.org/wiki/%D0%96%D1%83%D0%B0%D0%BD_I"
    title: "Жуан I"
    type:  "WIKIPEDIA"
  - url: "https://bg.wikipedia.org/wiki/%D0%96%D1%83%D0%B0%D1%83_I"
    title: "Жуау I"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Joan_I_de_Portugal"
    title: "Joan I de Portugal"
    type:  "WIKIPEDIA"
  - url: "https://co.wikipedia.org/wiki/Ghjuvanni_I_di_Portugallu"
    title: "Ghjuvanni I di Portugallu"
    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/Jan_I._Portugalsk%C3%BD"
    title: "Jan I. Portugalský"
    type:  "WIKIPEDIA"
  - url: "https://da.wikipedia.org/wiki/Johan_1._af_Portugal"
    title: "Johan 1. af Portugal"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Johann_I._(Portugal)"
    title: "Johann I. (Portugal)"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%99%CF%89%CE%AC%CE%BD%CE%BD%CE%B7%CF%82_%CE%91%CE%84_%CF%84%CE%B7%CF%82_%CE%A0%CE%BF%CF%81%CF%84%CE%BF%CE%B3%CE%B1%CE%BB%CE%AF%CE%B1%CF%82"
    title: "Ιωάννης Α΄ της Πορτογαλίας"
    type:  "WIKIPEDIA"
  - url: "https://eo.wikipedia.org/wiki/Johano_la_1-a_(Portugalio)"
    title: "Johano la 1-a (Portugalio)"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Juan_I_de_Portugal"
    title: "Juan I de Portugal"
    type:  "WIKIPEDIA"
  - url: "https://eu.wikipedia.org/wiki/Joan_I.a_Portugalgoa"
    title: "Joan I.a Portugalgoa"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%DA%98%D9%88%D8%A7%D9%88_%DB%8C%DA%A9%D9%85"
    title: "ژواو یکم"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Juhana_I_(Portugali)"
    title: "Juhana I (Portugali)"
    type:  "WIKIPEDIA"
  - url: "https://fo.wikipedia.org/wiki/J%C3%B3hannes_I_av_Portugal"
    title: "Jóhannes I av Portugal"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Jean_Ier_(roi_de_Portugal)"
    title: "Jean Ier (roi de Portugal)"
    type:  "WIKIPEDIA"
  - url: "https://gl.wikipedia.org/wiki/Xo%C3%A1n_I_de_Portugal"
    title: "Xoán I de Portugal"
    type:  "WIKIPEDIA"
  - url: "https://he.wikipedia.org/wiki/%D7%96'%D7%95%D7%90%D7%90%D7%95_%D7%94%D7%A8%D7%90%D7%A9%D7%95%D7%9F%2C_%D7%9E%D7%9C%D7%9A_%D7%A4%D7%95%D7%A8%D7%98%D7%95%D7%92%D7%9C"
    title: "ז'ואאו הראשון, מלך פורטוגל"
    type:  "WIKIPEDIA"
  - url: "https://hr.wikipedia.org/wiki/Ivan_I.%2C_portugalski_kralj"
    title: "Ivan I., portugalski kralj"
    type:  "WIKIPEDIA"
  - url: "https://hu.wikipedia.org/wiki/I._J%C3%A1nos_portug%C3%A1l_kir%C3%A1ly"
    title: "I. János portugál király"
    type:  "WIKIPEDIA"
  - url: "https://br.wikipedia.org/wiki/Jo%C3%A3o_Ia%C3%B1_Portugal"
    title: "João Iañ Portugal"
    type:  "WIKIPEDIA"
  - url: "https://an.wikipedia.org/wiki/Chuan_I_de_Portugal"
    title: "Chuan I de Portugal"
    type:  "WIKIPEDIA"

# bio (long form, separated for readability)
bio: |
  John of Aviz was born 11 April 1357, illegitimate and unlikely. A succession crisis gave him his chance: he fought Castile for the crown and won, founding the Aviz dynasty in 1385. The victory preserved Portugal's independence when annexation loomed. His reign stretched to 1433, 48 years that saw the kingdom turn outward — the first moves of overseas expansion happened on his watch. He died 14 August 1433, remembered well enough at home to earn the name João de Boa Memória.