Alexander Mar Thoma XIX (10 April 1913 – 11 January 2000) was the Metropolitan of the Malankara Mar Thoma Syrian Church with its center in Kerala state in south-western India.

His son Kunjachen ( Alexander Mar Thoma) was born on 10 April 1912.

To further his studies, he was making arrangements to go to Agra, when he was called by Dr.Abraham Mar Thoma Metropolitan to join the ministry.

He returned to Bangalore and in addition to his studies, was also the Assistant vicar to the Mar Thoma parish.

The title of his thesis was, "Viśvarūpa Darśana: a study of the vision of God in the Bhagavadgītā".

After returning to India in 1951, he was appointed as the vicar of Manganam (near Kottayam) Marthoma church for about a year.

Malankara Mar Thoma Syrian Church opened a College for higher education at Tiruvalla in 1952; Rev.

For this purpose, a special chair was made and Mar Thoma I the first bishop of Malankara church was enthroned.

During this period a number of Marthomites settled in various parts of India and began to emigrate to other countries.

So, according to the decision of church Mandalam (representative assembly), he was elevated to the position of Valia Thirumeni (senior Metropolitan) on 23 November 1999 and the responsibilities of the church were given to his successor Philipose Mar Chrysostom Suffragan Metropolitan.

He died on 11 January 2000 and was interred in the Bishops' cemetery in the SCS Compound, Tiruvalla.