Nope. The kedah( original name kedaram) monarchy survived for about 2000 yrs. Its the oldest civilisation in south east asia. Initially hindu-budhist.
According to 
Hikayat Merong Mahawangsa or the 
Kedah Annals, Kedah was founded by a 
Hindu king named 
Merong Mahawangsa. According to the text further, the 
Sultanate of Kedah started in year 1136 when King 
Phra Ong Mahawangsa converted to Islam and adopted the name Sultan Mudzafar Shah. However, an Acehnese account gave a date of 1474 for the year of conversion to Islam by the ruler of Kedah. This later date accords with an account in the 
Malay Annals where a raja of Kedah visited Malacca during the reign of its last sultan seeking the honour of the royal band that marks the sovereignty of a Muslim ruler.
[15]
It was later under 
Siam, until it was conquered by the Malay sultanate of 
Malacca in the 15th century. In the 17th century, Kedah was attacked by the Portuguese after their conquest of Malacca, and by 
Aceh. In the hope that Great Britain would protect what remained of Kedah from Siam, the sultan handed over 
Penang and then 
Province Wellesley to the British at the end of the 18th century. The Siamese nevertheless 
invaded Kedah in 1821,
[16] and it remained under Siamese control under the name of Syburi. In 1896, Kedah along with 
Perlis and 
Setul was combined into the Siamese province of Monthon Syburi which lasted until transferred to the British by the 
Anglo-Siamese Treaty of 1909.