J.J. Bysterus Heemskerk

1773 - 1841

Claimant or beneficiary


Amsterdam merchant and financier, awarded the compensation for the enslaved on five estates in British Guiana, three as a mortgagee and the other two probably as owner. The Heemskerk firm was one of the major Dutch mortgagees of property in Demerara.

  1. Dutch absentee and reportedly father of Jan Heemskerk (1811-1880) a newspaper editor and liberal politician.

  2. Son of Jan Heemskerk of Rotterdam (1735-1799) and Geertrujd Bijsterus 1746-1828. A younger brother, Hermanus Bartholomeus Heemskerk (1777-1811) died in Demerara.


T721/885 British Guiana nos. 637, 696; 662, 710 and 713 (as mortgagee).

  1. http://www.parlement.com 'Mr J. Heemskerk Bzn.' [accessed 05/08/2012].

  2. Nederlands Patriciaat, Vol. 47 (1961), pp. 135-147.

We are grateful to Paul Koulen for his help with this entry. Mr Koulen has analysed the 173 Demerara mortgages in 1818 detailed in CO 111/28 and found that 23 of these were held by J.J.B. Heemskerk, the single most important concentration. He suggests that the holdings flow at least in part from the takeover of two collective investment vehicles or funds established much earlier, one in 1768 and one in 1771.

Further Information

(1) Aletta van Eyk (2) Geertruid ten Cate
With (2) 5 sons, 4 daughters

Associated Claims (6)

£16,613 4s 1d
£5,357 7s 9d
£7,784 19s 9d
Unsuccessful claimant
£8,748 19s 3d
Awardee (Mortgagee)
£16,114 2s 4d
Awardee (Mortgagee)
£10,456 17s 8d
Awardee (Mortgagee)

Associated Estates (4)

The dates listed below have different categories as denoted by the letters in the brackets following each date. Here is a key to explain those letter codes:

  • SD - Association Start Date
  • SY - Association Start Year
  • EA - Earliest Known Association
  • ED - Association End Date
  • EY - Association End Year
  • LA - Latest Known Association
1834 [EA] - 1834 [LA] → Owner

Possibly mortgagee-in-possession

1826 [EA] - 1832 [LA] → Owner
1817 [EA] - 1834 [LA] → Joint owner
1834 [EA] - 1834 [LA] → Mortgage Holder

Addresses (1)

Amsterdam, Netherlands