Parents said to be, but I've yet to find any evidence to document the connection.
Father:  Thomas BROWN
Mother:  Bridget __?__

a.  Clarence Almon Torry.  1985.  New England Marriages Prior to 1700.  New England Historic Genealogical Society, Boston, MA (reprinted 1997, Genealogical Publ. Co., Baltimore, MD):

The "b" indicates the birth date of a child as an indication that the marriage took place before this time.  The locations are known residences of the husband, ending with the husband's place of death.  An entry in Torrey does not imply a marriage in New England; it only demonstrates the presence of a married couple there before 1700.  Torrey is a compilation of published sources, not primary records, so he should be considered a secondary source.
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b.  Clarence Almon Torry.  2015.  New England Marriages Prior to 1700.  New England Historic Genealogical Society, Boston, MA (repuslished; online at AmericanAncestors.org):

p. 219

BROWN, Jabez (-1992, Stow) & 1/wf Hannah BLANDORD; 23 Dec 1667; Sudbury {Brown (1931) (ms)20; Sv. 1:197, 267; Dawes-Gates 1:678; Warner-Harrington 808} BROWN, Jabez (-1692, Stow) & 2sf Deborah [HAYNES] (1659-1717), m/2 John BRIGHAM; by 1680; Sudbury {Brown (1931) ( ms) 20; Haynes-Noyes 4; Reg. 47:73, 64:35; Brigham 2:34; Haynes 61}

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.  Massachusetts Vital Records to 1850:  Sudbury Marriages (online at AmericanAncestors.org):

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Vol. VI, p. 178	BROWNE... Jabez and Hannah Blanford, Dec. 23 [1667]. M.R.
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.  Andrew H. Ward.  1863.  "Sudbury Records."  New England Historical and Genealogical Record 17(April):170-172; 17(July):254-

p. 170	Births... Hannah, dau. of John & Dorothie Blanford.... born 7, 1, 1644
p. 258	Marriages... Javits (Jabez) Brown & Hannah Blanford,.... 23 Dec. 1667 Births... Hannah, daughter of Jabez & Hannah Brown... born 21 June, 1670
p. 259	Births... Mary, daughter of Jabez & Hannah Brown.... born 16 Nov. 1672
p. 259	Births... Sarah of Jabez & Deborah Brown... born 20 May 1680

.  James Savage.  1860-62.  A Genealogical Dictionary of the First Settlers of New England Showing Three Generations of Those Who Came Before May, 1692.  4 vols.  Little, Brown, and Co., Boston, MA (online at Ancestry.com and GoogleBooks.com):

p. 267

BROWN... *JABEZ, Sudbury 1667, prob. s. of Thomas of Concord, freem. 1680; by w. Hannah had Mary, b. 26 Nov. 1672; and Sarah, 20 May 1680; was of Stow, rep. under the new chart. 1692.

"Probably" is not proof, and please note:  Savage is a secondary source.  He gives no citations, whatsoever, which is one reason the volumes contain so many errors.  For example, Sarah was the daughter of Jabez's second wife, Dorothy, not his first wife, Hannah, which would have been immediately evident if Savage had documented his work.

.  Sonia Abate.  n.d.  Thomas Brown of Sudbury (online at the Brown Society web site).