On 10 Oct 1830 Isabella II Queen Spain was born to Ferdinand VII King Spain (age 45) and Maria Christina of the Two Sicilies Queen Consort Spain (age 24). Coefficient of inbreeding 17.35%.

On 02 Jan 1667 Marie Thérèse Bourbon was born to Louis "Sun King" XIV King France (age 28) and Maria Theresa of Spain Queen Consort France (age 28). Coefficient of inbreeding 17.28%.

On 16 Nov 1664 Marie Anne Bourbon was born to Louis "Sun King" XIV King France (age 26) and Maria Theresa of Spain Queen Consort France (age 26). Coefficient of inbreeding 17.28%.

On 18 Nov 1662 Anne Élisabeth Bourbon was born to Louis "Sun King" XIV King France (age 24) and Maria Theresa of Spain Queen Consort France (age 24). Coefficient of inbreeding 17.28%.

On 05 Aug 1668 Philippe Charles Bourbon was born to Louis "Sun King" XIV King France (age 29) and Maria Theresa of Spain Queen Consort France (age 29). Coefficient of inbreeding 17.28%.

On 14 Jun 1672 Louis François Bourbon was born to Louis "Sun King" XIV King France (age 33) and Maria Theresa of Spain Queen Consort France (age 33). Coefficient of inbreeding 17.28%.

On 01 Nov 1661 Louis "Le Grand Dauphin" Bourbon Duke Burgundy was born to Louis "Sun King" XIV King France (age 23) and Maria Theresa of Spain Queen Consort France (age 23) at Palace of Fontainebleau, Fontainebleau, Seine et Marne. Coefficient of inbreeding 17.28%.

In 1736 Henry Dashwood aka Peyton 1st Baronet was born to George Dashwood of Hackney and Margaret Peyton. Coefficient of inbreeding 15.63%.

On 08 Sep 1633 Ferdinand King Bohemia IV King Romans was born to Ferdinand King Bohemia III Holy Roman Emperor (age 25) and Maria Anna of Spain Holy Roman Empress (age 27) at Vienna. Coefficient of inbreeding 15.19%.

On 09 Jun 1640 Leopold Habsburg Spain I Holy Roman Emperor was born to Ferdinand King Bohemia III Holy Roman Emperor (age 31) and Maria Anna of Spain Holy Roman Empress (age 33). Coefficient of inbreeding 15.19%.

On 21 Dec 1638 Maximilian Thomas Habsburg Spain Archduke Austria was born to Ferdinand King Bohemia III Holy Roman Emperor (age 30) and Maria Anna of Spain Holy Roman Empress (age 32). Coefficient of inbreeding 15.19%.

On 15 Jul 1637 Philip Augustus Habsburg Spain Archduke Austria was born to Ferdinand King Bohemia III Holy Roman Emperor (age 29) and Maria Anna of Spain Holy Roman Empress (age 30). Coefficient of inbreeding 15.19%.

On 22 Dec 1634 Mariana of Austria Queen Consort Spain was born to Ferdinand King Bohemia III Holy Roman Emperor (age 26) and Maria Anna of Spain Holy Roman Empress (age 28). Coefficient of inbreeding 15.19%.

On 13 May 1646 Maria Habsburg Spain Archduchess Austria was born to Ferdinand King Bohemia III Holy Roman Emperor (age 37) and Maria Anna of Spain Holy Roman Empress (age 39). Maria Anna of Spain Holy Roman Empress (age 39) died in childbirth. Coefficient of inbreeding 15.19%.

On 30 Aug 1334 Peter "Cruel" I King Castile was born to Alfonso "Avenger" XI King Castile (age 23) and Maria Burgundy Queen Consort Castile (age 21). Coefficient of inbreeding 14.45%.

In 1332 Ferdinand Ivrea was born to Alfonso "Avenger" XI King Castile (age 20) and Maria Burgundy Queen Consort Castile (age 19). Coefficient of inbreeding 14.45%.

On 09 Oct 1586 Leopold Habsburg Spain V Archduke Austria was born to Charles Habsburg Spain II Archduke Austria (age 46) and Maria Anna Wittelsbach (age 35). Coefficient of inbreeding 13.84%.

On 09 Jul 1578 Ferdinand of Spain II Holy Roman Emperor was born to Charles Habsburg Spain II Archduke Austria (age 38) and Maria Anna Wittelsbach (age 27). Coefficient of inbreeding 13.84%.

On 25 Dec 1584 Margaret of Austria Queen Consort Spain was born to Charles Habsburg Spain II Archduke Austria (age 44) and Maria Anna Wittelsbach (age 33) at Graz. Coefficient of inbreeding 13.84%.

On 04 Oct 1585 Anna of Austria Holy Roman Empress was born to Ferdinand Habsburg Spain II Archduke Austria (age 56) and Anna Caterina Gonzaga Archduchess Austria (age 19). Coefficient of inbreeding 13.08%.

Around 1510 Anne Huddlestone was born to Richard Huddlestone (age 29) and Margery Smythe at Sawston [Map]. Coefficient of inbreeding 12.62%.

Around 1535 Richard Huddlestone was born to Richard Huddlestone (age 54) and Margery Smythe. Coefficient of inbreeding 12.62%.

Lucy Huddlestone was born to Richard Huddlestone and Margery Smythe at Sawston [Map]. Coefficient of inbreeding 12.62%.

Cadwgan Aberffraw was born to Cadwaladr ap Gruffudd Aberffraw and Tangwystl ferch Cadwallon. Coefficient of inbreeding 12.60%.

Maredudd Aberffraw was born to Cadwaladr ap Gruffudd Aberffraw and Tangwystl ferch Cadwallon. Coefficient of inbreeding 12.60%.

Cadwallon Aberffraw was born to Cadwaladr ap Gruffudd Aberffraw and Tangwystl ferch Cadwallon. Coefficient of inbreeding 12.60%.

In 1573 Giles Brydges 1st Baronet was born to Charles Brydges (age 47) and Jane Carne at Wilton Castle, Herefordshire [Map]. Coefficient of inbreeding 12.52%.

On 22 Jun 1734 James Cocks was born to John Cocks of Castleditch in Eastnor in Herefordshire and Mary Cocks. Coefficient of inbreeding 12.50%.

Norfolk Salusbury was born to Colonel Thomas Salusbury of Bach-y-graig in Denbighshire and Lucy Salusbury. Coefficient of inbreeding 12.50%.

Thomas Salusbury of Bach-y-graig in Denbighshire was born to Colonel Thomas Salusbury of Bach-y-graig in Denbighshire and Lucy Salusbury. Coefficient of inbreeding 12.50%.

On 29 Jun 1725 Charles Cocks 1st Baron Somers was born to John Cocks of Castleditch in Eastnor in Herefordshire and Mary Cocks. Coefficient of inbreeding 12.50%.

On 03 Dec 1737 Thomas Somers-Cocks was born to John Cocks of Castleditch in Eastnor in Herefordshire and Mary Cocks. Coefficient of inbreeding 12.50%.