Johan Abraham Grill (1719 – 16 March 1799) was a Swedish merchant and politician.
He was the son of Abraham (I), the Elder, and Katarina Rozelius, his third wife.
He was a half-brother to Claes (I), Abraham (II) and uncle to Jean Abraham.
He married Christina Elisabeth Fischer (1731–1805).
It was Johan Abraham who introduced a motto for the Grill family: Ärlighet warar längst (Honesty is the best policy.).

In 1747, Johan Abraham became partner in the Grill Trading House.
Throughout his career he held a number of official positions and received several awards.
In 1763, he became a board member in the Jernkontoret (Association of Ironmasters), established in 1747, it is the oldest trade association in Sweden.
In 1767, he was a member of the Sjöförsäkringsrätten (The Naval Insurance Court) where he handled disputes related to shipping that could not be settled in any other way.
With the third charter, he became director of the SOIC in 1770.
At the same time he was an accountant and also responsible for credits and loans issued from the Swedish State to various companies.

Johan Abraham was a member of the hat party and helped finance the Swedish court and the hats activity in the Riksdag 1771–72, especially in connection to King Gustav III's coup d'état on 19 August 1772, whereby the king's power was solidified.
The money for the coup had to be smuggled out from the Grill House in Stockholm, to the Royal castle in double bottom, wooden troughs filled with mortar.
Johan Abraham continued to run the Trading House after Claes (I)'s death in 1767.
In 1799, Johan Abraham died and the company went bankrupt.
Johan Abraham Grill (1719 – 16 March 1799) was a Swedish merchant and politician. He was the son of Abraham (I), the Elder, and Katarina Rozelius, his third wife. He was a half-brother to Claes (I), Abraham (II) and uncle to Jean Abraham. He married Christina Elisabeth Fischer (1731–1805). It was Johan Abraham who introduced a motto for the Grill family: Ärlighet warar längst (Honesty is the best policy.).
In 1747, Johan Abraham became partner in the Grill Trading House. Throughout his career he held a number of official positions and received several awards. In 1763, he became a board member in the Jernkontoret (Association of Ironmasters), established in 1747, it is the oldest trade association in Sweden. In 1767, he was a member of the Sjöförsäkringsrätten (The Naval Insurance Court) where he handled disputes related to shipping that could not be settled in any other way. With the third charter, he became director of the SOIC in 1770. At the same time he was an accountant and also responsible for credits and loans issued from the Swedish State to various companies.
Johan Abraham was a member of the hat party and helped finance the Swedish court and the hats activity in the Riksdag 1771–72, especially in connection to King Gustav III's coup d'état on 19 August 1772, whereby the king's power was solidified. The money for the coup had to be smuggled out from the Grill House in Stockholm, to the Royal castle in double bottom, wooden troughs filled with mortar. Johan Abraham continued to run the Trading House after Claes (I)'s death in 1767. In 1799, Johan Abraham died and the company went bankrupt.
Grill family