Is Brahmaputra the only river with masculine name?

Question

Normally we have all major rivers in Bharat with feminine names for instance: Ganga, Yamuna, Saraswati, Godavari, Narmada, Gomti etc but Brahmaputra seems to be an exception with masculine name.

My questions:

1. Why a river with masculine name?
2. Is there any other major river with masculine name?

Answer 1

Appearantly, the “Sindhu” is also regarded as a male river:

sindhu m. and f. (prob. fr.1. sidh-,"to go") a river, stream (especially the indu-s, and in this sense said to be the only river regarded as m.See -nada-, column 2) etc. View this entry on the original dictionary page scan.

http://sanskritdictionary.com/?iencoding=iast&q=sindhu&lang=sans&action=Search

Also Viśāla is sometimes mentioned as a river in its masculine form, such as in the Apte’s “practical Sanskrit-English dictionary”:

http://sanskritdictionary.com/?q=viśāla
https://www.wisdomlib.org/definition/vishala#sanskrit

The Varaha Purana also mentions some rivers that take a masculine form:

Śoṇa (शोण)

http://sanskritdictionary.com/?q=śoṇa
https://www.wisdomlib.org/definition/shona#purana

Mahāvaktra (महावक्त्र)

http://sanskritdictionary.com/?q=mahāvaktra
https://www.wisdomlib.org/definition/mahavaktra#purana

Kṣīroda (क्षीरोद)

http://sanskritdictionary.com/?q=kṣīroda
https://www.wisdomlib.org/definition/kshiroda#purana

Answer 2

No. In sanskrit नद('Nada') means a rivers whose name is masculine and नदी ('Nadi') means a river with feminine name.Reference : http://sanskritdictionary.com/?iencoding=iast&q=नद&lang=sans&action=Search

There are many rivers with masculin names in India. Please check the list:

https://en.m.wikipedia.org/wiki/List_of_rivers_of_India