Devi Suvarchala, is daughter of Surya Dev. there is a misconception that many text states Devi to be wife of Surya Dev, and will clear all those, starting from Sri Vyasa Rachit Mahabharata (Anushashan Parva) say:
"Savitri is the chaste wife of Brahma. The chaste Sachi is the wife of
Indra. Dhumrorna is the chaste spouse of Markandeya, and Riddhi of
(king) Vaisravana. Varuna has Gauri for his spouse, and Surya has
loyal Suvarchala. Rohini is the chaste wife of Sasin, and Swaha of
Vibhavasu. Kasyapa has Aditi."
But the same, text tells only Devi Chaya and Devi Samjna or Sharanyu as the wife of Surya Dev, which is also supported by Srimad Bhagwatam Mahapuran (8.13.8):
विवस्वतश्च द्वे जाये विश्वकर्मसुते उभे । संज्ञा छाया च राजेन्द्र ये
प्रागभिहिते तव ॥
~ O King, I have previously described [in the Sixth Canto] the two daughters of Viśvakarmā, named Saṁjñā and Chāyā, who were the two wives of Vivasvān (Surya Dev).
If you read, Sri Mahabharata is comparing chastity of Devi(s), in simple language Chastity means loyalty and Suvarchala (Linseed or Sunflower) always follow sun in whatever condition been loyal to him, hence it is not stating about marriage status, which can be evident from text itself, which state only Devi Samjna and Devi Chaya to be wife of Surya Dev, which are off cause are not so loyal.
Further, In Sri Skanda Puran (3b.21.12b-13), Shiva Says to Maa Parvati:
I am Nārāyaṇa and you are Lakṣmī. I am Brahmā; you are Sarasvatī. You
are the daughter of Varuṇa and I am the leader of Serpents. You are
Rohiṇī and I am the Moon. You are Svāhā and I am the Fire-god. You are
Suvarcalā and I am the Sun-god.
But if we look ahead viz. 3b.21.14–17, Shiva says:
You are Gaṅgā and I am the Ocean. You are the fertile land and I am
Meru. You are Śacī and I am Indra. You are Rati and I am the god of
Love. You are Buddhi and I am Rāja-Rāja (i.e. Supreme sovereign,
Kubera). You are Śamā and I am the Wind-god; you are the wave and I am
the ocean. You are Prakṛti and I am Puruṣa. You are Vidyā and I am the
knowable. O Pārvatī, you are the word and I am its connotation. I am
supreme Lord and you, by the virtue of your being the order incarnate,
are a part of mine. O Goddess, you are competent to create, sustain,
annihilate, duly arrange, bless. Hence you must not entertain any
difference between us as is done by ordinary unenlightened people.
Read it carefully, again here, Shiva is not stating anything about marriage status, as we know Consort of Maa Ganga is Maharaj Shantanu, Consort of Sri Kuber is Devi Bhadra, wifes of Vayu Dev or wind god are Devi Bharati and Devi Svasti, so here he is comparing him and Maa Parvati as ‘inseparable’ as Knowledge and Knowable, Fertile land and Sumeru also wave and ocean.
Moving ahead, Sri Brahmanda Puran 2.10.4–7,21,76:
In the beginning of the Kalpa, the lord contemplated on a son on a par
with himself. Thereafter, the child Nīlalohita appeared on his lap. He
cried loudly in a terrible manner (voice). He appeared as though he
would burn by means of his briliance. On seeing the child Nīlalohita
crying suddenly, Brahmā spoke to him—“Why do you cry, O child?” He
replied—“Give me at the outset a name, O Grandfather.” “O lord, you
are named Rudra”. On being told thus he cried again. “Why do you cry,
O child?” asked Brahmā to him.
Brahmā said again to the child Nīlalohita—“O lord, at the outset, your
name has been mentioned by me as Rudra. The sun shall be the first
body unto thy first name”.
His first body has been glorified by the name Rauḍrī. Its wife is
Suvarcalā and her son is Śanaiścara (the Saturn).
Here, it’s said that the first Rudra is in form of Surya Dev, his wife is Devi Suvarcala and their son Sanaiscara or Saturn. Have you not feel something wrong here? As, we know Shani Dev or Sanaiscara is son of Devi Chaya and Surya Dev, which is evident from Srimad Vishnu Puran:
Sanjná, the daughter of Viśwakarman, was the wife of the sun, and bore
him three children, the Manu (Vaivaswata), Yama, and the goddess Yamí
(or the Yamuná river). Unable to endure the fervours of her lord,
Sanjná gave him Chháyá as his handmaid, and repaired to the forests to
practise devout exercises. The sun, supposing Chháyá to be his wife
Sanjná, begot by her three other children, Śanaiśchara (Saturn),
another Manu (Sávarńi), and a daughter Tapatí (the Tapti river).
This is fact in all of Purans, hence here ‘Suvarcalā’ is not other than Devi Chaya, just another name of her. [ The same implies to Sri Markhandeya Puran and Sri Linga Puran ]
Further, many quotes Sri Valmiki Rachit Ramayana 2.30.30 and state that Devi is wife of Surya:
धर्मः तु गज नास ऊरु सद्भिर् आचरितः पुरा | तम् च अहम् अनुवर्ते अद्य यथा
सूर्यम् सुवर्चला || २-३०-३०
~“Oh Sita, with thighs like the posteriors of an elephant! Earlier, righteousness (like fulfilling the father's command) was practiced by good men. Now, I shall follow that righteousness, like Suvarchala following the sun."
But, here Suvarchala means linseed plant also Sunflower, which always follows Sun and is attracted to him always:
Therefore, there is no mention of Devi Suvarcalā as wife of Surya Dev but she is his daughter.
In other side, Sri Hanuman Charitram by Maharishi Parshara states:
“Sri Hanuman had worshipped Surya as his guru and mastered the Vedas
under his guidance. However, he was not eligible to study one
important scripture- the Nava Vyakarnas (or nine grammars) as the
status of being married or being a 'family man' was required in order
to facilitate the completion of his education, the Trinity (Brahma,
Vishnu, Mahesh) approached Surya and created a beautiful girl name
Suvarchala Devi from its rays and luminescence. Sri Hanuman, who had
pledged a life of a Brahmachari, was initially confused at this
proposal. He refused it. Later, the Surya asked Sri Hanuman to marry
Suvarchala as a guru Dakshina. He explained to Hanuman "Suvarchala is
a divine woman. You would still be a Brahmachari even after marriage.
Your marriage is only for the welfare of the Universe and it would not
affect your chosen course."
Who is Maharishi Parshara?
Maharishi Parshara is the father of Maharishi Krishna Dwaipyan-Ved Vyas and author of Parshara Smriti and Srimad Vishnu Puran, since Srimad Vishnu Puran and Hanuman Charitram is written by him alone, they can’t contradict (As there is a misconception that in Srimad Vishnu Puran Devi Suvarchala is wife of Surya Dev)
Every Alwar and great Acharyas of Sri Vaishnavam and Madhava sampraday had saluted him in their every work, this is how Swami Deshikan salutes him in his [Sri Daya Satakam]:
पराशर मुखानः वन्दे भागिराथा न्ये स्थितान्ह् | कमला कान्ता कारुण्य
गङ्गाप्लावित मद्विधानः ||
~ Adiyen salutes Maharishi Parshara, who stand in the position of Bhagirathan to immerse me in the Karuna Pravaham of Srinivasan just as Bhagirathan brought Ganga to soak his ancestors’ ashes to bring them back to life.
The purpose of adding this verse is to state that his works can’t be unauthentic and his words are truth like Vedas. Hence, it's more clear now that Devi was Daughter of Surya Dev.
Jay Siya Ram