Hon. Muriel Berkeley

From thePeerage.com:

    Muriel Berkeley is the daughter of Thomas Berkeley, 5th Lord Berkeley. She married Sir Robert Throckmorton, son of Sir George Throckmorton and Katherine Vaux.

Children of Muriel Berkeley and Sir Robert Throckmorton

   * Anne Throckmorton

* Mary Throckmorton
* Elizabeth Throckmorton
* Catherine Throckmorton
* Thomas Throckmorton+ b. 1533, d. 13 Mar 1614
It is very likely that Muriel was born at Hovingham, Yorkshire, where the family held an estate and resided for several years. Upon returning from Yorkshire, Muriel's parents and family lived at Thomas' House at Mangotsfield. Thomas did not reside at Berkeley until after his brother, Maurice, died in 1523.

See source: The Berkeley manuscripts. The lives of the Berkeleys, lords of the honour, castle and manor of Berkeley, in the county of Gloucester, from 1066 to 1618; by Smyth, John, 1567-1640. Volume II. Edited by Sir John Maclean FSA. Publication date 1883-85. Publisher Gloucester

N.B. Smyth was working directly for the Berkeley family and had had access to all documents held in the Berkeley archives. He was responsible for coining the nicknames by which many of the Lords Berkeley have since become known.

From the will of George Throckmorton giving the approximate dates of Muriel's marriage
http://www.oxford-shakespeare.com/Probate/PROB_11-36_ff_160-2.pdf
And whereas by a pair of indentures made between Sir Thomas Berkeley, knight, Lord
Berkeley, of thone party, and me, the said Sir George [Throckmorton], of thother party, bearing date the
tenth day of November in the 18th year [=10 November 1526] of the reign of our late
Sovereign Lord King Henry the 8th concerning the marriage of Robert Throckmorton,
my son and heir apparent, unto Muriel, daughter of the said Lord Berkeley, the manors of
Toseland and Yelling in the county of Huntingdon and all other my lands, tenements and
other hereditaments in Toseland, Yelling, Paxton, Hemingford, Abbotswold, Payworth
and Saint Ives in the said county of Huntingdon were assured unto the said Robert
Throckmorton and to his heirs males of his body lawfully begotten after the decease of
me, the said Sir George Throckmorton, as by the said indentures plainly it may appear,
which manors, lands, tenements and other the premises in Toseland, Yelling, Paxton,
Hemingford, Abbotswold, Payworth and Saint Ives aforesaid I, the said Sir George, for
certain considerations have bargained and sold away from me and mine heirs forever, for
recompense, satisfaction and allowance whereof I have given to my said son, Robert
Throckmorton, and Dame Elizabeth Hungerford, now his wife, and to the heirs males of
their two bodies lawfully begotten, my manors of Soliholl and Sheldon with their
appurtenances in the county of Warwick, and all other my lands, tenements and
hereditaments in Solihull and Sheldon aforesaid, as by a deed by me thereof made to the
said Robert and Lady Elizabeth it doth and may appear, which deed and estate so by me
as is aforesaid made I do ratify, approve and confirm by this my present testament and
last will, and which manors of Solihull and Sheldon with th’ appurtenances and other the
premises in Solihull and Sheldon aforesaid be of as good or better yearly value as the said
manors, lands and tenements in Toseland, Yelling, Paxton, Hemingfold [sic?],
Abbotswold, Payworth and Saint Ives aforesaid;
And further I will that if it happen the said Robert Throckmorton and Lady Elizabeth, his
wife, to die without issue male of their two bodies lawfully begotten, then I will that my
said manors of Solihull and Sheldon with their appurtenances and all other the premises
in Solihull and Sheldon aforesaid shall wholly remain to the heirs males of the body of
my said son, Robert Throckmorton, lawfully begotten, and for default of such issue to the
heirs males of my body lawfully begotten, and for default of such issue to the right heirs
of me, the said Sir George, forever;
And whereas also by the covenants of the said indentures made between the said Lord
Berkeley and me, the said Sir George Throckmorton, the manor of Roxton with th’
appurtenances in the county of Bedford and all other my lands, tenements and
hereditaments in Roxton aforesaid, the manor of Birdingbury with th’ appurtenances and
all other my lands, tenements and hereditaments in Birdingbury in the county of [f. 160v]
Warwick, and certain lands and tenements in Milnerton, Brinklow, Studley, Alcester and
Grafton in the said county of Warwick and in Elmley and Dormston in the county of
Worcester were likewise assured unto the said Robert Throckmorton, my son, and to his
heirs after the decease of me, the said Sir George, which manors of Roxton and
Birdingbury aforesaid and all other the premises in Roxton, Birdingbury, Mylnerton,
Brinklow, Studley, Alcester, Grafton, Elmley and Dormston aforesaid for divers
considerations be now by me bargained and sold away to divers persons and to their heirs
forever, for recompense, allowance and satisfaction whereof I will that after my decease
my manors of Weston with th’ appurtenances in the county of Buckingham and all other
my lands, tenements and hereditaments in Weston aforesaid shall descend, remain and go
unto the said Robert Throckmorton, my son, and to the said Lady Elizabeth Hungerford,
his wife, and to th’ heirs males of the body of the said Robert lawfully begotten, and for
default of such issue to th’ heirs males of my body lawfully begotten, and for default of
such issue to the right heirs of me, the said Sir George Throckmorton, forever;